upstream and down stream valves 中文意思是什麼
upstream and down stream valves
解釋
順流和逆流閥門-
These fire - safe valves provide a bubble tight barrier on both upstream and down stream seats and eliminate possible product contamination or loss of fluids due to valve leakage
這種防火安全閥門在上游和下游閥座提供氣密性屏障關閉性能,消除了由於閥門泄漏造成產品污染或流體損失的可能。
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