旋转式压缩机采用了一组螺杆，将一定体积的空气压缩成为体积更小压力更高的空气，直至系统达到所需要的压力。
Rotary compressor has adopt a group of screw, will certain volume of air compressor become smaller pressure higher air, until the system to achieve need pressure.
放卷：气压提升式放卷架、配磁粉自动张力系统。
Unwinding: Hydraulic lifting unwinding rack, equipped with magnet powder auto tension system.
空气制动系统。气压作动装置。第2部分：制动室楔式制。
Air braking systems - pneumatic actuator - part 2: brake Chambers, technical data for wedge brake.
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