Drilling operations are operations

Drilling operations are operations in which holes are produced or refined by bringing a rotating cutter with cutting edges at the lower extremity into contact with the workpiece. Drilling operations are done primarily in drill presses but sometimes on lathes or mills.

結果 (中文) 1:

钻井作业是产生或精制而带来一个旋转刀具切削刃与工件接触下肢成孔的操作。主要在钻床，但有时在车床或轧机上进行钻井作业。

結果 (中文) 3:

钻井作业是通过将一个在下肢的切削刃的旋转刀具与工件接触而产生或精制的操作。钻井作业主要是在钻床上，但有时在车床或米尔斯。