看看挠性整体楔形闸扳电磁阀 solenoid valve, solenoid operated valve 罐底排污阀 flush-bottom tank valve 复式安全泄气阀 twin type safety valve ..
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...部排污阀 bottom blowdown valve ; bottom blow valve ; down valve 罐底排污阀 flushbottom tank valve ; flushbottom tank ale ; bottom tank ale ; Flushbottow tank valve 上排污阀 scum valve ; upper scum valve ..
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