From the development history of school desks and chairs, we can see the rapid progress of industrial production and technology, from the beginning of the wooden desks and chairs, to plastic desks and chairs, and the emergence of steel and wood desks and chairs, are a great proof of the development of the times. As the name suggests, school desks and chairs are used in the campus, need to meet the use of a large number of students, therefore, compared to home desks and chairs, school desks and chairs will be more demanding, for example, it needs to be more rugged and more durable, practical and beautiful as far as possible, in order to ensure that to meet the use of a large number of students need. Moreover, we not only have to take into account the practical application of school desks and chairs, but also as far as possible to strive for school desks and chairs can be reused or recycled, this is to avoid waste of resources to meet the need to protect the environment. Below we will focus on the main features of school desks and chairs, the use of school desks and chairs as well as the efficient use of methods to carry out some discussions.

School desks and chairs have some subtle differences in different teaching scenarios, here we only discuss the main features. After all, want to reuse the premise is to do a good job in the selection.

1. Safe and comfortable: table legs are stable to ensure that the table is not easy to fall down. If the edges of the table and chairs have obvious bumps or sharp edges, it is obviously not going to work.

2. large storage: the table top is wide and provides enough space for studying and writing. It can improve students’ learning efficiency and comfort. At the same time, the footprint should not be too large to ensure that a classroom has enough space for placement.

3. Moisture-proof and flame retardant: students will come into contact with water when in use, so the waterproof and moisture-proof performance of desks and chairs must meet the requirements. Student desks and chairs also have certain requirements for flame retardant properties, because it is related to the safety of students’ lives.

4. Environmentally friendly materials: chairs and tables are well-designed, easy to clean and maintain. Desktop is directly in contact with the student body, is closer to the students, so the desktop substrate selection of environmental protection, formaldehyde emissions qualified, no odor.

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More detailed information about the school desks and chairs reused can be found by visiting:https://www.aoyangschoolfurniture.com/a/news/features-of-school-desks-and-chairs.html

Tunnel lining cart is a special equipment that must be used in the secondary lining of tunnel construction process, which is used for the concrete lining construction of the inner wall of the tunnel. This equipment is an indispensable non-standard product for secondary lining, mainly including simple lining cart, fully hydraulic automatic walking lining cart and net frame lining cart. This equipment has a streamlined structure, convenient operation, standardized and modular design in all aspects, which is easy to manufacture, shipment, on-site disassembly and management.

Tunnel lining cart is widely used in industrial production, medical scene water conservancy, underground engineering, mining and tunnel construction and other fields. Among them, the advantages of tunnel lining cart in tunnel construction are mainly reflected in the following aspects:
1. Construction efficiency: tunnel lining cart can be quickly moved to any position in the tunnel, so that the lining construction can be carried out continuously, reducing the movement time of construction personnel and equipment, thus significantly improving the construction efficiency.
2. Construction cost control: By using tunnel lining carts, the demand for human resources can be reduced, and the mechanization rate of tunnel second lining construction can be improved, thus reducing the labor cost and improving the construction progress.
3. Construction quality assurance: Tunnel lining cart can ensure the shape and size accuracy of concrete lining, provide a stable operation platform for construction personnel, and help to improve the quality of tunnel lining construction.

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More detailed information about the advantages of tunnel lining dollies in tunnel construction can be found by visiting:https://www.gf-bridge-tunnel.com/a/blog/advantages-of-tunnel-lining-dollies-in-tunnel-construction.html

Ball press, also called powerful ball press, mineral powder ball press, roller ball press, goose egg molding machine, etc., is a kind of machine and equipment that presses powdery materials into ball shape. It operates through a movable ball and a powerful transmission system, and gradually increases the pressure to achieve compression by changing the trajectory of the ball movement. Some common materials we see in life such as charcoal, clay, coke chips, coal, activated carbon, cryolite, fertilizer, plastics, limestone, pigments, etc., ball press machine can be pressed dough, granulation or ball. The ball press is applied in an extremely wide range of fields, playing a key role in metallurgy, chemical industry, energy and other industries, to meet the demand for spherical granular products in the production process.

The main advantages of ball press machine:

1. After the ball press machine made of molded materials, energy saving and environmental protection, easy to transport, improve the utilization rate of waste materials, help to reduce dust, control the weight of the volume, return to use, with good economic and social benefits.

2. After years of industrial use and improvement of the ball press, compared with other similar products, has a high rate of ball formation, low power consumption, compact structure for easy maintenance and debugging and other obvious advantages.

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More detailed information about the use ball press machine efficiently can be found by visiting:https://www.zymining.com/en/a/news/efficient-use-of-ball-presses.html

Slewing bearings are a key component in the machinery industry, capable of withstanding combined loads, and are mainly used to carry and rotate various machine components. Its advantages include high load-bearing capacity, low energy consumption and high speed. Commonly found in gearboxes, drivelines and machine tools, slewing bearings are widely used and are known as the “joints of the machine”, providing efficient transmission and precise motion control. Choosing the right slewing bearing can help improve the performance and reliability of machinery and equipment.
Before the application of slewing bearings, the installation is also to ensure the subsequent normal operation of a major key, so a full understanding of the installation steps is also very necessary. Here we look at the installation of slewing bearings of several steps.
1. Before installing the slewing bearing, we should carry out a comprehensive inspection of the equipment to ensure that the equipment is in good condition. First of all, we have to check the host mounting surface to ensure that the supporting parts should have sufficient strength, the motor and the slewing bearing connected to the size of the various parts of the matching degree and flexibility.

2. In the process of subassembly installation and combination installation of the slewing bearing, it should be carefully and carefully protected to prevent damage. When installing the slewing bearing, put the slewing bearing horizontally on the installation base platform, check the position of the soft belt (generally labeled S), and put the soft belt and the blocking position in the non-load area or light load area. With a ruler to see the slewing bearing plane and the installation of the foundation plane whether there is a gap, if there is a large gap to prove that the installation of the foundation is not good flatness, if the conditions allow should be reworked to install the foundation, if the conditions do not allow, can be used in the gap at the method of eliminating the gap by using a pad of copper.

3. If the installation of the teeth of the slewing bearing needs to adjust the tooth side clearance, the correct tooth side clearance is very important to find the tooth high point (top of the tooth green paint or blue paint) position, can be used to measure the adjustment of the slewing bearing and pinion tooth side clearance, the general value of the side clearance adjusted to (0.03-0.04) times the modulus, adjusted the tooth side clearance, after manually rotating the slewing bearing at least one turn to verify that the teeth mesh without the phenomenon of hysteresis, and then install the bolt! According to 180 ° direction symmetrical continuous tightening, after checking to ensure that all the bolts on the circumference according to the required torque tightening.

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More detailed information about the slewing bearing installation steps can be found by visiting:https://www.mcslewingbearings.com/a/news/slewing-bearing-installation-steps.html

Steel structure is a structure composed of steel materials and is one of the main types of building structures. The main load-bearing members are made of steel, and it is widely used in large-scale factories, gymnasiums, ultra-high-rise buildings, bridges and other fields by virtue of its advantages of high strength, light weight, fast construction and strong resistance to deformation, etc. We can see that the applicability of steel structure is very strong, especially in the field of construction, which greatly solves the difficult problem that the construction site is susceptible to the influence of factors such as temperature and humidity, and helps to improve building It helps to improve the quality and safety of construction.
Compared to traditional concrete buildings, steel structures replace reinforced concrete with steel plates or profiles, which has obvious advantages in the field of construction. Below we highlight a few of the major advantages of using steel in construction:
1. High strength and light weight: Steel structure is characterized by high strength and low weight, and its tensile, compressive and flexural strengths are much higher than those of traditional building materials. Under the same load, the self-weight of steel structure is lighter, which is convenient for transportation and installation, especially suitable for structures with large span or heavy load.

2. Fast construction speed: the components of steel structure are usually prefabricated in the factory and then transported to the site for assembling, this prefabricated production and fast on-site assembling greatly shortens the construction cycle, is not affected by the season, and can be carried out normally under the conditions of cold or rainy season.

3. Good seismic resistance: steel structure has good ductility and toughness, and can absorb a lot of energy, so it performs well under dynamic loads such as earthquakes. The steel structure adopts the cold-formed thin-walled steel component system, which can effectively prevent the steel plate from rusting and increase the service life of the components.
4. Economy and energy saving: low maintenance cost, long service life, and cost-effective. Steel structure can be recycled and utilized to reduce construction waste, which contributes to environmental protection as well as sustainable economic development.

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More detailed information about the advantages of using steel structures in construction can be found by visiting:https://www.meichensteel.com/a/news/advantages-of-using-steel-structures-in-construction.html