The major difference between the discharge and suction valves installed in most low pressure, reciprocating air compressors is that()

A、one valve seats upwards, while the other seats downwards B、the reed valves used on the discharge are made substantially thicker and heavier than thesuction valves C、the suction valve springs exert a greater tension than the discharge valve springs D、the discharge valve springs exert a greater tension than the suction valve springs

时间:2022-09-26 05:08:27 所属题库:船舶电气与船舶安全题库

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