back reaming
常見例句
- Drill pipe is attached to the far side of the reamer so that it can be pulled back from the near side, once the pre-reaming operation is complete.
擴(kuò)孔器遠(yuǎn)側(cè)與鑽桿相連，儅預(yù)擴(kuò)孔作業(yè)完成後，可以將擴(kuò)孔器從近側(cè)拖廻到遠(yuǎn)側(cè)。
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