inverted valve 中文意思是什麼
inverted valve
解釋
上面的汽閥-
H the high - raisepitch of pump also must install inverted - end valve at export - pipeline, to prevent the water - hammer of closed suddenly to destroy
8揚程高的泵在出口管路上還應該安裝逆止閥,以防突然停機的水錘破壞
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