hand hold drill 中文意思是什麼
hand hold drill
解釋
手持式鑿巖機-
It is forbidden to hold the work - piece by hand to drill holes. the work - piece must be fixed tightly in jaw vice or fixed it on the worktable with press plate
禁止用手握住工件進行鉆孔,應該把工件緊固在虎鉗中或用壓板固定在工作臺上。
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