Litmash&Metalurgy Russia 2024

Litmash&Metalurgy Russia 2024: Revolutionizing Brick Production with Lianda Brick Making Machine

In an ever-evolving world driven by innovation and advanced technology, the stage is set an impressive display of engineering marvels at Litmash&Metalurgy Russia 2024. Amidst the awe-inspiring array of cutting-edge machinery, one name is making waves and ushering in a new era in brick production – Lianda Brick Making Machine.

Lianda Brick Making Machine, an epitome of excellence and precision, stands tall as the embodiment of ingenuity in the field. Its sleek design and state-of-the-art features have attracted the attention of industry leaders and enthusiasts alike, awakening a sense of futuristic possibility in the realm of construction.

At the forefront of its groundbreaking capabilities lies Lianda's enhanced automation system. This ingenious integration of intelligent software and robotics streamlines production processes, eliminating human error and enhancing efficiency to unprecedented levels. It is a true testament to the power of technology to revolutionize traditional industries.

 

Moreover,  Lianda Brick Making Machine boasts unbelievable versatility, capable of producing a wide range of brick types to cater to diverse architectural requirements. From conventional clay bricks to eco-friendly alternatives, the machine adapts effortlessly, appeasing the demands of sustainable construction practices. Throughout the exhibition, spectators were captivated by the seamless transition between various brick textures, colors, and sizes, all made possible by this remarkable invention.

Yet,  Lianda Brick Making Machine's influence extends beyond merely reshaping the manufacturing process. It embodies a conscientious dedication to environmental preservation. With its eco-friendly operation and optimized energy consumption, it serves as a beacon of hope, suggesting that progress need not come at the expense of our planet. This commitment to sustainability not only aligns with evolving industry norms but also with the global pursuit of a greener future.

Visitors to Litmash&Metalurgy Russia 2024 couldn't help but feel a sense of anticipation and exhilaration when witnessing the prowess of the Lianda Brick Making Machine. Its presence at the exhibition signifies a turning point in the construction industry, heralding a new generation of advanced technology that transcends traditional production methods.

As we look ahead to the future, one can only imagine the transformative impact Lianda and its Brick Making Machine will have on the global construction landscape. With a visionary mindset and an unwavering commitment to innovation, this remarkable invention has truly etched its name in the annals of progress, making Litmash&Metalurgy Russia 2024 an unforgettable milestone in the tale of modern craftsmanship.

In conclusion,Lianda Brick Making Machine's debut at Litmash&Metalurgy Russia 2024 is a testament to human creativity and the potential of technology to reshape industries. With its unrivaled efficiency, versatility, and sustainability, it epitomizes the essence of progress. As it ushers in a new era of brick production, it leaves us eagerly anticipating the architectural masterpieces that will grace our world in the years to come.

Loading and shipping QYJ 6000 Automatic Brick Press Machine

Amidst the raging tempest of a typhoon, the dedicated members of the Lianda team stand firm, ensuring the timely loading and shipment of the brick production line. With unwavering dedication, the Lianda personnel exemplify the spirit of "addressing customer needs promptly and understanding their desires." Despite the furious winds and relentless rain, nothing can deter our commitment to our valued customers. The inclement weather may pose a challenge, but it cannot break our determination to provide exceptional service.

In the face of adversity, our team remains resolute, undeterred by the forces of nature. We work tirelessly to fulfill our promises, transcending the barriers created by the storm. Each member of our team understands the urgency of our customers' needs, sympathizing with their concerns and striving to surpass their expectations.

As the tempest rages on, our team's perseverance shines through. We refuse to let the weather hinder our commitment to delivering excellence. Our dedication knows no bounds, as we rise above the challenges brought forth by nature. Rain or shine, we persist, fueled by a shared passion for serving our customers.

And so, amidst the roar of the storm, our resolve remains unyielding. We stand strong, steadfast in our mission to provide unparalleled service. While others may seek shelter from the tempest, we face it head-on, embracing the chaos as an opportunity to prove our mettle.

In conclusion, despite the tumultuous conditions brought by the typhoon, the Lianda team tirelessly remains at their posts, ensuring the seamless operation of the brick production line. With unwavering determination and a relentless pursuit of excellence, we defy the elements and fulfill our commitment to our valued customers. The storm may rage on, but our resolve remains unshak.

QYJ-8000 Automatic Brick Press Machine Revolutionizing Waste Management with Automated Hydraulic Pressure Technology

In today's rapidly changing world, the need for efficient waste management solutions has become paramount. QYJ-8000 Automatic Brick Press Machine emerges as the trailblazer in this domain, incorporating cutting-edge technology to streamline the process. With its automated hydraulic pressure system, this groundbreaking innovation is set to revolutionize the way we handle waste.

Effortless Efficiency:
Gone are the days of manual labor and time-consuming processes.  QYJ-8000 Automatic Brick Press Machine takes center stage by seamlessly combining hydraulic power and automation. This advanced technology ensures that waste materials, such as paper, plastic, and organic substances, are effortlessly transformed into durable bricks that can be used for construction or industrial purposes.

Unleashing the Power of Automation:
The automated hydraulic pressure technology embedded within QYJ-8000 Automatic Brick Press Machine is the backbone of its efficiency. This intelligent system detects and optimizes the pressure required for different waste materials, ensuring consistent and high-quality brick production. Through precise control and monitoring, it minimizes downtime, enhances productivity, and curtails resource wastage, making it an invaluable asset in waste management.


Environmental Advantages:
When it comes to waste management, the environmental impact cannot be overlooked. Traditional waste disposal methods often perpetuate pollution, but  QYJ-8000 Automatic Brick Press Machine brings about a breath of fresh air. By converting waste into bricks, this machine drastically reduces landfill waste, lessens carbon emissions, and champions the concept of sustainable development. It is an eco-friendly solution that cares for the planet while providing tangible benefits.


Versatility and Adaptability:
QYJ-8000 Automatic Brick Press Machine is designed to cater to a wide range of waste materials, allowing for optimal versatility. Whether it's recycled paper, plastic bottles, or organic matter, this machine handles them all with ease. Its adaptive nature enhances its compatibility with various industries, presenting endless opportunities for waste management and resource utilization. From construction projects to industrial applications, this innovation takes waste materials from zero to hero.


The Future of Waste Management:
Innovation is the driving force behind progress, and  QYJ-8000 Automatic Brick Press Machine is a testament to that. By bringing together hydraulic power and automation, it sets a new standard for waste management. As we strive for a cleaner and greener tomorrow, this state-of-the-art technology illuminates the path forward. QYJ-8000 Automatic Brick Press Machine's ingenuity and efficiency gift us a glimpse into a future where waste is no longer a burden but rather a valuable resource.


Conclusion:
QYJ-8000 Automatic Brick Press Machine heralds a paradigm shift in waste management. With its automated hydraulic pressure technology, it transforms waste materials into bricks, paving the way for a more sustainable and efficient future. By mitigating environmental impact, streamlining processes, and embracing versatility, this innovation takes waste management to unprecedented heights. Embrace the revolution and witness how  QYJ-8000 Automatic Brick Press Machine propels us towards a cleaner, brighter, and moreful world.

 

Working Video of QYJ-4000 Automatic Brick Press Machine in Oman

QYJ-4000 Automatic Brick Press Machine Line, fulfilling customized specifications, has been exclusively designed for the production of reinforced cement products, specifically versatile concrete pavers. Praised by our esteemed client in Oman for its exceptional stability and impressive output, this advanced machinery is revolutionizing the manufacturing process.

 

Efficiency is at the forefront of this cutting-edge machine, boasting seamless automation and precision engineering.  QYJ-4000 allows for streamlined production of concrete pavers, ensuring consistent quality across every unit. With its state-of-the-art technology, this automated brick press machine line is poised to elevate construction projects to unparalleled levels of excellence.

 

Featuring a comprehensive range of innovative features, this machinery offers unrivaled versatility. The customized design caters precisely to our client's needs for producing unique-shaped cement products. Whether it's interlocking pavers, decorative blocks, or heavy-duty slabs, QYJ-4000 is capable of delivering precision and finesse with remarkable ease.

 

Remarkably, our customer in Oman has also commended the reliability and stability of this marvelous equipment. QYJ-4000 boasts impeccable performance, ensuring long-lasting durability and extended operational life. With a team of diligent engineers dedicated to fine-tuning each machine, we guarantee the highest quality standards that epitomize excellence.

 

 QYJ-4000 Automatic Brick Press Machine Line not only transforms the manufacturing process but also revolutionizes the potential of construction projects. Its advanced capabilities facilitate the realization of intricate designs, enabling architects and designers to unleash their creativity. The resulting concrete products are not just functional but also aesthetically stunning, elevating any space they embellish.

 

In conclusion,  QYJ-4000 Automatic Brick Press Machine Line in Oman has emerged as a game-changer, meeting and exceeding the client's expectations. With its remarkable stability, exceptional output, and customization options, this machinery enables the production of high-quality and versatile concrete pavers. Its elegant design, coupled with advanced technological features, delivers unmatched performance and reliability. Join the league of visionary builders, and let QYJ-4000 redefine what's possible in the world of construction.

 

Do electric car need water pumps?

Electric water pump for EV’s battery cooling is an important part of the new energy vehicle cooling system, mainly used to accelerate the flow of battery coolant circulation, to keep the appropriate temperature during working.

 

Here are several reasons for electric water pump in EV’s:

  1. Efficient Cooling: Electric water pumps provide precise control over the flow rate and temperature of the coolant, ensuring efficient cooling of the engine, battery pack, and other components. They can adjust the coolant flow based on the specific needs of the system, helping to maintain optimal operating temperatures and prevent overheating.
  2. Energy Savings: Electric water pumps operate independent of the engine, unlike traditional mechanical water pumps driven by a belt connected to the engine. This allows them to be more energy-efficient because they consume power only when necessary, rather than running continuously. By eliminating the parasitic losses associated with mechanical water pumps, EVs can achieve better overall energy efficiency and extended driving range.
  3. Thermal Management: Electric vehicles often require advanced thermal management systems to regulate temperatures in the battery pack and power electronics. Electric water pumps play a crucial role in maintaining the appropriate temperature levels by circulating the coolant through the cooling loop and radiators. They can adjust the coolant flow to different areas of the system based on the thermal demands, ensuring efficient heat dissipation and optimizing the overall performance and lifespan of the components.
  4. Flexibility in Design: Electric water pumps offer more design flexibility for EV manufacturers. They can be integrated into various locations within the cooling system, allowing for efficient packaging and optimization of available space. This flexibility enables better vehicle design choices and can contribute to improved aerodynamics, weight distribution, and overall vehicle performance.

 

Overall, electric water pumps in EVs provide precise cooling control, energy savings, effective thermal management, and design flexibility, contributing to the efficiency, performance, and reliability of the electric vehicle systems.

Coolant Water Pump

History of Chinese Youtiao deep fried dough sticks

Introduction:
Chinese cuisine is renowned for its diverse and delectable dishes, and one of the most beloved breakfast items is the famous Chinese deep-fried doughnut known as "youtiao." With its crispy exterior and soft, fluffy interior, youtiao has become a staple food in China and has gained popularity worldwide. In this article, we will delve into the intriguing history youtiao and its evolution over the years.

Ancient Origins:
Youtiao traces its origins back to ancient China, with evidence of its consumption dating as far back as the Song Dynasty (960-1279). During that time, youtiao was known as "youzhaguo" and was primarily consumed by scholars and intellectuals. The unique shape of the youtiao, resembling the traditional Chinese "jian" (a double-edged straight sword), had symbolic significance, representing knowledge and wisdom.

Evolution and Popularity:
Over the centuries, youtiao underwent several transformations to become the beloved breakfast food it is today. Originally, it was made by twisting two pieces of dough together and frying them until golden brown. However, during the Ming Dynasty (1368-1644), a variation called "shaobing" came into existence. Shaobing featured a flakier texture and a rectangular shape, differentiating it from the traditional youtiao.

During the Qing Dynasty (1644-1912), the method of making youtiao was further refined. It became more elongated and thin, resembling chopsticks or oil-fried dragons, leading to its popular name "youtiao," which translates to "oil-fried devil." This name reflects the crispy and twisted appearance of the fried dough.

Symbolism and Superstitions:
Apart from its culinary significance, youtiao also carries cultural symbolism in Chinese society. In Chinese legends, youtiao is associated with a story about desperate scholars who drowned themselves in a river due to failing the imperial examinations. It is believed that the twisted shape of youtiao represents the intertwined fingers of these scholars, offering homage to their determination in pursuing knowledge.

Regional Variations:
While youtiao is commonly consumed throughout China, different regions have their own variations. In northern China, youtiao is typically thicker, longer, and has a softer texture, making it an ideal companion for soy milk or rice porridge. In the south, youtiao is thinner, shorter, and crispier, often enjoyed with congee or as an ingredient in various stir-fried dishes.

International Influence:
With the spread of Chinese cuisine overseas, youtiao has gained popularity around the world. It can now be found in Chinese restaurants and Asian supermarkets in various countries. In Southeast Asia, especially in Vietnam, Thailand, and Malaysia, youtiao is known as "cakwe" or "char kway," and it is often served with a sweet chili sauce or used as an ingredient in dishes such as "bakso" or "wantan mee."

Conclusion:
From its humble origins in ancient China to its widespread popularity today, youtiao holds a special place in Chinese cuisine and culture. Whether enjoyed as a breakfast item, a snack, or an accompaniment to other dishes, youtiao continues to captivate food enthusiasts with its distinctive taste and texture. It is a testament to the enduring legacy of Chinese culinary traditions and their ability to transcend borders and captivate taste buds worldwide.

Mastering the Art of Bread Making with Our Modern Baking Machines

                                    Mastering the Art of Bread Making with Our Modern Baking Machines

Introduction:
Welcome to the world of perfect bread making, where creativity and convenience come together effortlessly. With our state-of-the-art baking machines, achieving bakery-quality bread has never been easier. In this article, we will guide you through the steps how to create the perfect of bread using our extraordinary machines.

1. Selection of Ingredients:
To make a perfect bread, the first step begins with carefully selecting the finest ingredients. Opt for high-quality flour, ensuring its freshness and ideal protein content. By using premium ingredients, you are ensuring that your bread will have exceptional flavor and texture.



2. Precise Measurements:
Achieving the perfect bread requires precision in measurements. Our baking machines come equipped with advanced measurement features, allowing you to accurately add the required amount of flour, water, yeast, and other ingredients. This guarantees consistent results with each bread you bake.


3. Customizable Settings:
Our modern baking machines offer a wide range of customizable settings, allowing you to achieve the perfect bread tailored to your preferences. Whether you prefer a soft and fluffy white bread or a hearty whole-grain loaf, our machines offer the versatility to fulfill your desires.



4. Kneading and Rising:
The secret to achieving a perfect bread lies in the kneading and rising process. Our baking machines feature efficient dough-kneading functions, ensuring thorough mixing and development of gluten. With precise temperature and time controls, the dough is provided with ideal conditions for rising, resulting in a perfectly fluffy and well-structured bread.

5. Baking:
Once the dough has risen to perfection, it's time for the grand finale – baking! Our machines offer precise temperature controls and even heat distribution, ensuring that your bread is evenly baked to a golden-brown hue. The aroma that fills your kitchen will be a testament to your baking mastery.

Conclusion:
With our cutting-edge baking machines, creating the perfect bread is no longer a distant dream; it is within your grasp. From selecting the finest ingredients to the precise measurements and customizable settings, our machines will assist you in your quest for bread making perfection. Elevate your baking experience and delight your family and friends with loaves of artisanal bread that would make any professional baker proud. Begin your journey towards perfect bread today!

food processing machine development history

I am a machine sales man , to be accurate, I am a sales man as well as a half machine engineer, as I have been in the food machine area for about 12 years. I witnessed the food machine development in Chinese market. At the beginning of the area, most of the machines were imported from abroad, such as from European countries, Janpan,etc. And most of the machines were from Taiwan province,China. To be honest, at that time, for example, 2005, the technology is not mature in China market, which made it difficult for Chinese food factories to buy the machine and make the products, as it replied on the import and the price was also very high at that time.

380V Kaya Bun Bread Production Line Automatic

The Chinese nation is a nation that loves learing, during the coming 15 years, they developped the technology and strated to make the machines by ourselves, at the beginning, there is big difference on the machine quality compared with the machines from abroad, while with the continual improvement, the food machine has been more and more mature, and shared a good reputation not only in domestic market but also abroad. And now, China has exported the machines to and more countries and share good reputation.

In my memory, when I strat in this area, I learned the encrusting machine and the bread forming machine, at that time, this type machines are rare, when we made the machine, it can be sold easily..while as that time, people didn't have much knowladge on the machine and the recipe of the products, they can not make the product very profect, and they also didn't know that many products can be made by the same one machine..for example, for encrusting machine, it can make moon cake, maamoul, mochi, fish balls, cookies by the same one machine, that we called it multi-functional machine.. for the 380V 3Ph Pastry Production Line, it can not only make the pastry, but also can make bread, steamed buns, etc..

Now, with the development of the technology and the improvement of the knowladge on food recipes, we know much more of the machine and now, we can not only know how to make the products by the machine, but also need to know how to make it better..This is the requirment on the basis of the standard of the requests from market.

I have been in this area for 15 years, and for the next 15 years, I think I will also working in this area, as I like this area and there are much to be learn from it, learn from the excellent colleague, learn from brilliant people. In the future, there will still have much improvement in this area, we need to follow it, to improve ourselves, to make our machines better to serve more and more customers.

At last, we warmly welcome all of the customers from different places, different countries can come and visit us, we can discussed together and make small contribute to the food machine areas.

Textile fabric pilling test box method experimental process

1.Scope

This standard specifies the method of using a pilling box to determine the degree of pilling of fabrics without pressure.

Comply with standards: GB/T 4802.3-1997 replaces GB 4802.3-84. This standard is applicable to most fabrics, and is more suitable for wool needle woven fabrics.

2. Reference standards

The provisions contained in the following standards constitute provisions of this standard through reference in this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision and parties using this standard should explore the possibility of using the latest version of the following standards. GB6529-86 Standard atmosphere for humidity conditioning and testing of textiles GB8170-87 Numerical rounding rules

3.definition

This standard uses the following definition.

3.1 Pilling After friction, the fiber ends of the pilling fabric protrude from the surface and become entangled with each other to form small balls of fluff.

3.2 Pilling resistance The ability of the fabric to resist pilling.

4.principles

According to the specified method and parameters, put the fabric sample on the polyurethane plastic tube and put it into a rotating square wooden box lined with rubber cork for rolling. Under specified lighting conditions, compare the rolled sample with the standard sample to evaluate the pilling grade.

5.devices

5.1 Pilling box: square wooden box, the inner wall is lined with 3.2mm thick rubber cork, and the length of each side of the unlined inner wall is 235mm. The box speed is 60r/min.

5.2 Polyurethane sample tube, weight 50g, length 140mm, diameter 30mm.

5.3 Use a 114mm square sample punch, or use a template, pen, or scissors to cut the sample. Approved by the State Bureau of Technical Supervision on 1997-06-09 and implemented on 1997-12-01

5.4 Sewing machine.

5.5 Tape paper.

5.6 Standard photos: Standard photos are a five-level system.

5.7 rating box

6.Regulator wet and test atmosphere

Atmospheric humidity conditioning, humidity conditioning and testing are carried out in accordance with the standards specified in GB 6529. The arbitration test adopts the secondary standard atmosphere.

7.specimens

7.1 The sample is humidified under the standard atmosphere for testing.

7.2 Randomly cut the sample at an upper and lower position 10cm away from the edge of the fabric. There should be no defects on the sample that would affect the test results.

7.3 Cut four pieces of 114mm×114mm specimens, fold them in half with the test side facing inward, and sew them into a specimen cover with a sewing machine at a distance of 6mm from the edge (see Figure 1). There are two longitudinal (meridian) sample sets and two transverse (weft) sample sets.

7.4 Turn over the sewn sample cover so that the fabric test side faces outward.

7.5 The sample is placed on the sample tube under uniform tension. The seam edges of the sample cover should be flat and spread apart on the sample tube.

7.6 In order to fix the position of the sample on the sample tube and prevent the sample from loosening, wrap the edge of the sample with tape (the length shall not exceed one and a half circles of the sample tube).

8.test steps

8.1 Before the test, the pilling box must be clean, and no short fibers or other substances that may affect the test should be left.

8.2 Put the four carrier tubes with specimens in them into the box, close the box lid firmly, and pull out the counter to the required number of rotations.

8.3 The preset revolution number is 7200r for coarse woven fabrics and 14400r for worsted fabrics or the number of revolutions according to the agreement.

8.4 Start the pilling box. When the counter reaches the required number of revolutions, remove the sample from the sample tube and remove the sutures; unfold the sample and compare it with the rating standard sample to evaluate the pilling procedure of each sample. Expressed as the nearest 1/2 level.

9.results

The pilling grade of the sample is expressed as the average value (level) of four samples. Calculate the average and round to two decimal places. If the decimal part is less than or equal to 0.25, go to the next level (for example, 2.25 is level 2); if it is greater than or equal to 0.75, go to the next level (for example, 2.85 is level 3); if it is greater than 0.25 and less than 0.75, take 0.5 .

10.Test report

Explain that the test was conducted according to the standard and report the following:

a) The name, specifications and batch number of the sample;

b) Test date;

c) Test conditions;

d) Model of the instrument

e) Pilling level

f) Any details that deviate from this standard and abnormal phenomena during testing must be explained.

Appendix A (standard appendix)

Pilling boxes and accessories

A1 rubber cork lining

After a period of use, the surface of rubber cork may become smooth or adhere to grease, softener and finishing agent. These changes will reduce the degree of pilling. When this happens, wiping the rubber cork with methanol should restore the original pilling performance; if it still fails after wiping, the rubber cork lining must be replaced.

Method for determination of friction properties of rubber cork surfaces (see Appendix B). After a new pilling box is started or a new lining is replaced, the friction properties of the rubber cork surface lined in the pilling box must be measured to determine the changes in the surface friction coefficient after use and to understand the service life of the rubber cork. When the friction coefficient of rubber cork drops below 1/2 of the original value, it needs to be replaced with new rubber cork.

A2 sample tube

It is necessary to check whether the new sample tube has any traces of the model during manufacturing, and the convex surfaces at both ends must be smooth.

A3 check

The pilling performance of the instrument can only be checked directly with fabric. A certain number of two or more fabrics of different grades (from grade 1 to grade 4) should be selected as reference fabrics. Regularly or when necessary, use the reference fabric for testing, compare with the original sample, and determine the differences and changes in pilling boxes or the same pilling box.

Appendix B

(Appendix to the standard) Method for determination of surface friction properties of rubber cork linings

Measuring the surface friction properties of rubber cork can be used to judge the pilling tail energy of the pilling box. It is important to check the friction properties of the rubber cork surface regularly after starting a new pilling box, replacing the rubber cork lining, or during use.

B1 Equipment and Supplies

B1.1 A wooden block with a volume of 115mm×55mm×15mm and a weight of about 55g, and a string for weighing the plate.

B1.2 200g weight.

B1.3 Pulleys and pulley devices (see Figure B1). Figure B1 Device for measuring friction performance

B2 Operating Procedures

B2.1 When verifying the rubber cork lining, it must be placed on a horizontal surface (see Figure B1).

B2.2 As shown in Figure B1, place the wooden block, 200g weight, weighing plate and pulley device, and the connection line should be parallel to the plane.

B2.3 Add weights to the weighing pan until the wooden block begins to move at a constant speed on the surface of the rubber cork lining. When adding weights to the weighing pan, do not impact the weighing pan.

B2.4 Use formula (B1) to calculate the friction coefficient CF of the rubber cork surface:

CF=(Mass of the weighing pan (g) + Mass of the weight on the weighing pan (g)) / (Mass of the wooden block (g) + Mass of the weight pressed on the wooden block 200g)------------------B1

 

Email: hello@utstesters.com

Direct: + 86 152 6060 5085

Tel: +86-596-7686689

Web: www.utstesters.com

TEYUN Car baler introduction

Car baler, also known as car body/car shell compactor press machine. Car baler is a new type of baler developed by TEYUN for scrap cars. It is mainly composed of three parts: body, hydraulic system and grab.

Car baler mainly packs various low-carbon and light-weight production and life scrap steel, scrap cars, and light metal structural parts made of steel into scrap steel blocks that meet the furnace charge. It is an ideal equipment for steel mills, non-ferrous metal smelting industry, precision casting industry and raw material production.

 

 

Features

1. The car baler has a large volume and opening area, a large feeding amount, and high working efficiency. It is extremely convenient for processing materials with larger shapes, especially for centralized feeding and taking materials.

2. Simple and easy to learn, intuitive and convenient operation.

3. PLC control is adopted, with high reliability and easy maintenance.

4. Each moving part is hydraulically driven, with stable operation and high working efficiency.