The merit of funnel drilling machine and its practical example;
钻斗钻机的优点及其工程实践实例
unit-type drill head
组合钻床钻头, 标准钻头
To bore(a shaft) with a trepan.
钻用钻井机钻（矿井）
offshore drilling
海底钻探;海上钻井;海上钻探;海洋钻井;海洋钻探;近海钻探;滨外钻探
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
tap(ping) drill
螺丝孔钻，螺丝底孔钻
combination center drill
组合中心钻，复合中心钻
churn-type percussion drill
无游梁绳式顿钻钻机
easing the bit in
钻头轻压慢转钻进地层
mixed oil drilling rig
复合式石油钻井钻机
deepwater drilling
深水钻进、深海钻进
auger with valve
(钻浅井用) 带阀螺旋钻具
The sorker was drilling.
此工人在用钻孔机钻孔。
A tool used for drilling.
钻头用于钻孔的工具
This drill can bore through rock.
这台钻机能钻透岩石.
a bit used in drilling for oil.
油田钻井使用的钻头。
An oil platform.
钻井平台石油钻井平台
Diamond drilling replaced percussion drilling.
金钻探取代了冲击钻探。