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.
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.
禁止用手握住工件进行钻孔，应该把工件紧固在虎钳中或用压板固定在工作台上。