全部所需的就只是一个活门。
发动机上，用来降低压气机压力的活门。
A valve on the engine for reducing pressure in the compressor section.
隔膜，用气压或液压操作的活门机构中的柔性部件。
DIAPHRAGM, A flexible part for operating a valve mechanism by pressure.
隔膜，用气压或液压操作的活门机构中的柔性部件。
DIAPHRAGM, A flexible part for operating a valve mechanism by pressure.
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