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US3684006A Piston check valve 失效
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Piston check valve
摘要:
A check valve includes a valve housing having a valve cover, a valve seat and spring loaded valve diaphragm with a valve spindle, and base for the valve spindle. The free end of the spindle is made in the form of a piston and the valve spindle cover is in the form of a cylinder through which a blast of control gas enters.
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