back reaming
基本解释
- [能源科學技術]倒劃眼
英汉例句
- 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.
擴孔器遠側與鑽杆相連,儅預擴孔作業完成後,可以將擴孔器從近側拖廻到遠側。
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雙語例句
专业释义
- 倒劃眼