unload valve 中文意思是什麼
unload valve
解釋
卸荷閥-
Top ( upper ) mounting type : unnecessary to unload valve from pipeline for maintenance but just by opening the bonnet for on - line maintenance
頂裝式:閥門維修時不需要從管道拆下,只要打開閥蓋即可進行在線維修。
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