空运行的WOB - L活塞泵，最好用于高压设备(主要是压缩机)。
Dry running WOB-L Piston pumps. Best performance characteristics for high pressures. Mainly used as a compressor.
碳素压球机液压保护装置是由液压泵将高压油打入液压缸，使活塞产生轴向位移。
Carbon pressure ball machine device is a hydraulic pump hydraulic protection will be high pressure oil into the hydraulic cylinder, driving the piston produce axial displacement.
当踩下制动踏板后，从空气压缩机l来的高压气体推动气液总泵4的气活塞，气活塞再推动油活塞。
When the pressure to the brakes, the air compressor from lto promote the gas-liquid high-pressure gas 4 gas piston master cylinder, gas piston and then push the oil piston.
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