serrated lock washers external teeth 中文意思是什麼
serrated lock washers external teeth
解釋
外鋸齒鎖緊墊圈-
Serrated lock washers. external teeth. concave form
雙排齒鎖緊墊圈.凹形 -
Serrated lock washers external teeth
外齒鎖緊墊圈
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