return-to-vertical type 中文意思是什麼
return-to-vertical type
解釋
斜轉直型-
Non - return flaps storm valves, self - closing, vertical type, dn 50 up to dn 150, pn 1 - mating dimensions for flanges according to pn 10
Dn為50 - 150標稱壓力為1的垂直自閉式止回閥
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