gravity nut 中文意思是什麼
gravity nut
解釋
重力水平梯度測量-
Gravity ball check valves are converted to foot valves by replacing the union nut and end connector on the receiving end ? seat end ? of the body with an f. v. screen housing assembly
重力球形止回閥可以變為底閥,只需在接受埠-閥體的閥座埠,用一個f . v .濾網殼組件更換管接頭螺母和埠連接件即可。
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