back reaming

基本解釋

• [能源科學(xué)技術(shù)]倒劃眼

英漢例句

雙語例句

• 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(yuǎn)側(cè)與鑽桿相連，儅預(yù)擴孔作業(yè)完成後，可以將擴孔器從近側(cè)拖廻到遠(yuǎn)側(cè)。
  www.infopetro.com.cn

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詞組短語

短語

• reaming and back reaming 劃眼和倒劃眼

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專業(yè)釋義

能源科學(xué)技術(shù)

• 倒劃眼