They held fast to the brake handle on the drilling rig.

他们紧紧握住钻井机制动器的手柄。

youdao

Feed the new drilling line (fast line) through the side of the drawworks drum.

把快绳头穿过绞车辊筒的一边。

youdao

DST (drill Stem test), a fast test for show of oil and gas while drilling.

即中途测试，是指油井在钻井过程中，对有。

youdao

DST (drill Stem test), a fast test for show of oil and gas while drilling.

即中途测试，是指油井在钻井过程中，对有。

youdao