permanent flow valve 中文意思是什麼
permanent flow valve
解釋
恆流閥-
The valve seat shall be an elastomeric seal that will permit seating at low - head pressure, and an arrow shall be molded on the valve body for permanent visibility to indicate the intended direction of flow
閥座應該是彈性密封,它使得閥座處于較低的排出壓力下,箭頭應該永久性清晰可見地模鑄在閥體上,標明計劃的流向。
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