If I had time, I should read a drilling manual.
假如我有时间，我就会读一本钻井手册。
Drilling more takes time as the water table here is deep.
由于地下水位很深，开凿更多水井需要一定的时间。
When drilling deep holes, the feed movement should be released from time to time.
在钻深孔的时候，有时必须放松进给运动。
For a long time, perforation is Just regarded as the last simple process in drilling.
长期以来，射孔被认为是钻井工程的最后一道简单工序。
For a long time, perforation is Just regarded as the last simple process in drilling.
长期以来，射孔被认为是钻井工程的最后一道简单工序。
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