fill off bottom 井底填砂
buoyant off-bottom tow method 离海底浮拖铺管法
off-bottom setting tool 不坐底坐封工具
off-bottom spacing 离井底的距离
buoyant off-bottom connection method 浮式离开井底接管法
hook load off bottom 钻柱离底时大钩负荷
off-bottom 离底
off-bottom culture 非海底养殖
off-bottom trawling 拖网离底作业
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。
They want to be sure that he is not dealing off the bottom of the stack of cards.
VOA: special.2009.11.22
We just go through the list top to bottom, left to right, and cross names off as we go.
我们会从上到下,从左到右看那个问题清单,如果解决了就把名字擦掉。
STUDENT: -- want to be off the bottom branch.
学生:脱离最底层的分支。
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