drilling-in unit
洗井和钻油层用的小钻机
5.9 The penetration rate (ROP) has been 6.18 meters per hour.
机械钻速为6.18米/小时。
A machine in the tower gradually cuts a narrow hole down into the ground.
井架内的钻机渐渐地往地下钻出一个小洞来。
To bore(a shaft) with a trepan.
钻用钻井机钻（矿井）
The gremlins have got into the computer again.
捣乱的小精灵又钻进计算机里了.
a small portable drill held and operated by hand.
用手掌握和推动的一种小手动钻机。
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
churn-type percussion drill
无游梁绳式顿钻钻机
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.
The old worker emerged from under the car, his hands dirty with machine oil.
老工人从小车底部钻了出来，他的手沾满了机油。
make a small hole in something as a guide for a drill.
在某物上做一个小孔，好像为钻孔机做向导。
On the application of raise-boring machine in small shaft construction assisted by grouting in top-soil
反井钻机表土层小井灌浆施工技术的研究
a small bit that drills a first hole to guide a larger drill.
钻凿初洞来导引大钻头的一种小钻头。
Raise-boring machines
GB/T12761-1991天井钻机
spider bow [for well drilling machines]
星形斗[钻井机用]