Best of all, advocates of drilling say, damage to the environment would be insignificant.
支持钻井的人们说，最好的一点是它对环境的破坏是微乎其微的。
Some engineers think it would be no use drilling further in that direction.
一些工程师认为，再朝那个方向钻是没有用的。
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。
Welding and geo-drilling must be strictly implemented operation system, due to special guard over homework.
电焊、气焊要严格执行操作制度，明火作业应有专人看守；
If the initial workpiece is solid, a drilling operation must be performed first.
如果初始工件是实心的，则必须首先进行钻孔作业。
Drilling there would be strictly a wildcat operation.
在那里钻井绝对是一次盲目的行动。
In deep drilling process, casing wear is the problem that cannot be ignored.
在深井、超深井钻井过程中，套管磨损有可能导致套管封隔失效和油气井的早期报废。
The machine can be miniaturized because it needs less drilling power and p…
对钻机功率与加压能力要求不高，便于钻机小型化。
The machine can be miniaturized because it needs less drilling power and p…
对钻机功率与加压能力要求不高，便于钻机小型化。
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