Oil reducing valve belongs to the pilot valve piston valve.
进口油用减压阀属于先导活塞式减压阀。
Thus the function of the distance between valve and piston is put forward.
据此提出气门和活塞间距离的函数。
Major production and distribution piston rings and valve seat.
主要生产和经销活塞环及气门座圈。
The port valve is a key part in a piston pump.
配流阀是柱塞泵中十分重要的元件。
When engine is running, the valve and piston moves according to a certain rule.
发动机在运转时，气门、活塞各遵循一定的规律。
When engine is running, the valve and piston moves according to a certain rule.
发动机在运转时，气门、活塞各遵循一定的规律。
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