bobtail

用法例句

churn-type percussion drill

无游梁绳式顿钻钻机

To bore(a shaft) with a trepan.

钻用钻井机钻（矿井）

high-thrust drill

强力钻机，高推力钻机

kelly for well-drilling machiens

旋转钻孔,钻井机用

mixed oil drilling rig

复合式石油钻井钻机

The sorker was drilling.

此工人在用钻孔机钻孔。

This drill can bore through rock.

这台钻机能钻透岩石.

A Study of the Technique of Cable Drilling in Modern Time;

浅述近代冲击(顿钻)钻井工艺技术

back-brake support

顿钻捞砂轮刹车支架

Raise-boring machines

GB/T12761-1991天井钻机

spider bow [for well drilling machines]

星形斗[钻井机用]

Study on Dynamic Characteristics and Failure Mechanism of Drill String in Air Drilling

气体钻井钻柱动力学特性及钻柱失效机理研究

SHALLOW HORIZONTAL DRILLING TECHNOLOGY BY USING VERTICAL-WELL RIG IN HENAN OILFIELD

河南油田直井钻机钻浅层水平井钻井技术

drilling machine, mining or quarrying, not self-propelled

开矿或采石用钻机,非自动钻机

drilling-in unit

洗井和钻油层用的小钻机

Oil whooshed up when the drill hit the well.

当钻孔机钻井时，石油喷了出来。

Using a drill, he bore a hole through the wood.

他用钻孔机在木头上钻了一个孔。

The machine used for drilling is called a drill press.

用于钻孔的机器叫做“钻床”。