Double Flap Valve mix valve 怎么翻译
Double Flap Valve mix valve 怎么翻译
valve
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阀门中的 double nippel、cap、valve seat in the body、valve seat on
这句怎么怿?Air Valve Sizing
GATE VALVE API600 BB-BG-OS&Y CL150 RF ASTM A216 WCB怎么翻译
spring,suction valve suction 空压机上的东西,请高手翻译.
阀门翻译globe valve din cast steel 398