看着井架工或钻工的手势，司钻慢慢的把游车或顶驱挂住。

The driller slowly hangs off the traveling block or top drive in accordance with the derrickman's or floorman's signal.

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阐述了液压支架所用立柱、千斤顶的缸筒在上深孔钻镗床进行镗孔、滚压之前必须进行的加工工艺的设计。

This paper expounds the design of processing techniques before hole-boring on the cylinder of upright post and hoisting jack used in the hydraulic support.

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该方法的初采钻爆技术是解决顶煤破碎与顺利放出的有效途径之一。

The technique of primary drilling and blasting is an effective way to solve the problem of crushing, caving and transportation.

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