| 摘要 |
A manual/pneumatic dual-control oil pump facilitates a manual operation and pneumatic operation. The housing of the oil pump is provided with a pair of chambers receiving modular check valves, respectively. Hydraulic equipment can be connected to the oil pump through a high pressure hose. The two chambers are in communication with each other and the outlets of the chambers join together at a delivering conduit through which the liquid is supplied to the hydraulic equipment. Each modular check valve unit forms several check valves which can thus be replaced at one time in their entirety.
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