1.
gas electric rig
天然气发电机 钻机
2.
To bore(a shaft) with a trepan.
钻用钻井机钻（矿井）
3.
high-thrust drill
强力钻机，高推力钻机
4.
diesel electric driving rig
柴油机发电驱动钻机
5.
Raise-boring machines
GB/T12761-1991天井钻机
6.
A Design of Electronic-cell Hardware to CNG Diesel;
柴油天然气发动机电控单元硬件设计
7.
Systerm Design and Frequncy Control of Natural Gas Generating Unit;
天然气发电机组系统设计与频率控制
8.
kelly for well-drilling machiens
旋转钻孔,钻井机用
9.
churn-type percussion drill
无游梁绳式顿钻钻机
10.
mixed oil drilling rig
复合式石油钻井钻机
11.
The sorker was drilling.
此工人在用钻孔机钻孔。
12.
This drill can bore through rock.
这台钻机能钻透岩石.
13.
Electronic Control System Design for Compressed Natural Gas Engines Based on AVR MCU
AVR单片机的天然气发动机电控系统设计
14.
a hammer driven by electric motor.
用电发动机驱动的钻。
15.
Design and Experiment on the Electric Control System Based on EPR for the CNG Engine
基于电控调压器的压缩天然气发动机电控系统
16.
Development of Ignition Control System for Electronic Controlled Natural Gas Engines
电控天然气发动机点火控制系统的开发
17.
spider bow [for well drilling machines]
星形斗[钻井机用]
18.
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