screw back 耳環扣什麽意思

screw back英 [skru: b?k] 美 [skru b?k]

[詞典][體] 倒轉;

[網絡]螺絲底;

[例句]Place the screw back into the relief valve disc and tighten.

將螺絲放回到安全閥閥瓣內，並加以緊固。