wrench head 中文意思是什麼
wrench head
解釋
六角形螺母-
While unscrewing the injector button head, a second wrench must be used to assure that the injector body is not loosened from the main valve
在擰松注入器圓頭螺栓時,要用第二個扳手固定住注入器,防止其從主閥門上松落下來。 -
Engineers wrench, single head
單頭工程扳手
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