钻孔超深subdrill;subgrade;over-drilling depth excess drilling 炮孔切断out-off of hole 炮孔利用率efficiency of borehole blast hole utilization factor ..
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Off he goes, and I drag you out of the hole.
他走了,我把您从洞里拖上来。
Before he wast 'other side of the river I was out of the hole; him and his raft was just a speck on the water away off yonder.
在他划到河对岸以前,我已经从洞中爬了出来,他和他那节木筏子在远处河上只是一个黑点子罢了。
The driller is to trip off bottom and out of the hole at a speed that will not cause swabbing.
司钻要用一个对井底不会产生抽吸的速度进行起钻。
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