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Modern office chair

Q: What are tensile and shrink wrapping?: Stretching: one of the basic characteristics. The tensile feature is to draw the cross section of the drawn cross section in a specified tensile direction at a specified depth. Stretching is the most commonly used entity creation type that is suitable for creating rule entities and should be skilled.The main purpose: contraction of envelope: complex parts or components 1. can be used as a reference or package model to create a lightweight version; 2. can be used to create geometric model sharing relationship with suppliers and customers, and get rid of what you don't want to share details; file - save a copy - type contraction envelope; create components, in the form of a activation element inserts - shared data - shrinkwrap -- referring to the type for the components of a subset of context.

Q: What is a limiter?: To understand what a limiter is, you should first know what a telescoping device is The expansion device is also called expansion joint, expansion joint, compensator and expansion joint. Expansion device capable of axial expansion in a certain range, the offset can overcome different axial pipe butt within a certain angle and produce, installation and convenient disassembly pipeline valve greatly, in the pipeline to allow expansion in free expansion, once over its largest expansion amount rise to limit, to ensure the safe operation of pipeline the

Q: The working principle of the bolt tensioner: Bolt hydraulic stretcher or bolt tension, it uses hydraulic booster pump (ultra high pressure hydraulic pump) source, according to the tensile strength, yield tensile and elongation coefficient determined, using ultra high pressure pump the stretch, the bolt is applied force in the elastic deformation zone is stretched, the diameter of the bolt a slight deformation, so that the nut is easy to loose, and it can be used as a hydraulic interference connection device of applied axial force, top pressure installation. The biggest advantages of stretcher can make a plurality of bolts and fixed value fastening and disassembly, uniform force distribution, is a safe, efficient and fast tool is the best way to bolt fastening and disassembly of various specifications. Used in petrochemical, nuclear power, wind power, hydropower, thermal power, ships, railways, aerospace, mining, heavy machinery and other fields. According to different working conditions, application conditions and user requirements, it can be used as a special stretcher design.

Q: Mechanical structure and principle of automatic focusing lens for camera: Ultrasonic ranging method, which is based on the ultrasonic wave in the digital camera and the time between the subject of distance measurement. Digital cameras are equipped with ultrasonic transmitting and receiving device, when the ultrasonic vibration generator for ultrasonic, ultrasonic to the subject, is the receiver's perception of return immediately, and then by the integrated circuit according to the ultrasonic round-trip time to calculate the focusing distance.

Q: Mechanical principle of belt expansion machine: Conveyor sections: two, three, four. Width of conveyor belt: 500, 600, 700, 800, 1000, 1200mm. Belt conveyor speed can be selected: constant or variable speed. Belt conveyor direction can be selected: one-way or two-way conveying materials. Belt conveyor angle can be selected: horizontal, fixed angle or automatic lifting. The fixed section of the conveyor can be fixed or fixed. Conveying speed: <30 M / min.. Conveyor capacity: <70 kg / m..

Q: What is a bolt tensioner? How do you use it?: Pretension is a familiar term in machinery, architecture and other fields. General general description: in the connection (connection mode and use is various, before the work load is), in order to enhance the reliability of the connection and close, to prevent the load by connecting cracks or slip and pre applied force between.

Q: What kind of materials are used in the telescopic equipment of machinery industry?: The most common form of bond failure is shear. So the key requires enough strength and steel. No. 45 is the most commonly used steel.

Q: How do you pull the contracted muscles with a mechanical device?: Common causes of muscle spasms: fatigue: when the body is tired, the normal physiological functions of the muscles change, and at this point, the muscles will have a lot of lactic acid accumulation, and constantly stimulate muscle spasm. Electrolyte imbalance: a large amount of sweat during exercise and a large amount of electrolyte loss. The main components of sweat are water and salt, and losing too much salt can cause muscle tension and cramping. Cold stimulation: in cold climates, such as swimming, it is stimulated by cold water, especially when the preparation is inadequate, and muscles tend to spasm. How to do it: when a muscle spasm occurs, it usually relieves the spasm by pulling the spastic muscles in the opposite direction. Attention should be paid to keeping warm during the process. When pulling, the force should be uniform, and the violence should not be avoided, so as to avoid muscle strain. Abdominal muscle spasm, you can do the back stretch to lengthen the abdominal muscles, you can also abdominal hot compress and massage. When the calf muscle spasm, can unbend the knee joint, brings back the toe, simultaneously holds the foot with both hands, forcibly upward draws.

Q: What is the automatic telescopic function of an automatic umbrella?: The most important thing about the design of a fully automatic long handled umbrella is the choice of the elastic potential energy device between the upper and lower springs. The traditional semi automatic long handle umbrella pushes the slide block upwards through the pretightening force between the springs between the two sliders so as to realize the opening of the long handle umbrella. Therefore, it is proved by experiments that if a spring is added to the slider, and whether the slider can move downward similarly, the experiment shows that the umbrella can be closed. Then, the following work is how to determine the size difference and working state of the two spring preload.

Q: What are the main uses of a bolt tensioner?: But the general does not hurt the threaded bolt tensioner, high precision, high tensile bolt General requirements is the most appropriate, domestic stretcher good brand, I recommend Prima, quality customer service is good, and I hope to help you!

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