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.
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.
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.
经现场使用试验证明，本研究所制备的具有梯度结构的硬质合金顶锤、涂层刀片以及硬质合金钻齿的使用性能均明显优于常规均匀结构的硬质合金。
Practical tests show that the performance of cemented carbide anvils, coated blade and drill bits with graded structure developed in this dissertation are superior to those with regular structure.
钻工使用气动旋扣器卸开扣，或者如果可能，司钻用顶驱卸开扣。
The Floormen spin out the connection using the air spinner, or if applicable, the Driller utilises the top drive to spin out the connection.
钻工使用气动旋扣器卸开扣，或者如果可能，司钻用顶驱卸开扣。
The Floormen spin out the connection using the air spinner, or if applicable, the Driller utilises the top drive to spin out the connection.
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