Double disc swing foot valve
... 旋启式止回阀Swing check valve 旋启双瓣式底阀Double disc swing foot valve 旋塞阀Cock ...
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... 旋启式止回阀 ng check valve 旋启双瓣式底阀 Double discng foot valve 旋塞阀 Cock ...
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... 底阀 footvalve 旋启双瓣式底阀 doubldiscswingfootvalve 旋启多瓣式止回阀 multi-discswingcheckvalve ...
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