This would assist the drilling of a bore hole into the mine, to take a gas reading from near where the miners are.
这将有利于向煤矿下钻孔，来读出矿工所在位置附近的气体指数。
The video was taken with a camera lowered down a narrow bore-hole from the surface, some 700m (2, 300ft) above.
该视频由一架透过地面（离矿底约700米（2300英尺）高）一狭窄钻孔下伸的摄像机拍摄而成。
Based on the basic features of dynamic gas emission during boring process, a theoretical model for calculating the dynamic volume of gas emission from bore hole is set up.
基于钻孔过程中瓦斯动态涌出的基本特点，建立了钻孔瓦斯动态涌出量的理论计算模型。
The guided drilling system includes a drill string configured to continuously and accurately bore a hole in the ground without the need to periodically break the connection of the drill string.
该定向钻探系统包括一根构成能连续地和精确地在地面上钻孔并且无需周期地断开其连接的钻杆柱。
This machine bed can pack to the head of clip-drill and the drills with many bore, making drill a hole more convenient.
本机床可装钻夹头和多孔钻座，使钻孔时更加方便。
This paper introduces a technique of erecting framework and rig at the upper part of the caisson, making underwater boring and oriented explosion by layers within the bore hole.
本文介绍了在沉井上部搭台架设钻机，进行水下钻孔，孔内分层定向爆破技术。
This drill the census that machine be applicable to solid mineral bed explores and work. The distance geology investigates etc, drills a hole and every kind of concrete construction Check bore.
本钻机适用于固体矿床的普查勘探及工程地质勘察等钻孔以及各种混凝土结构检查孔。
This drill the census that machine be applicable to solid mineral bed explores and work. The distance geology investigates etc, drills a hole and every kind of concrete construction Check bore.
本钻机适用于固体矿床的普查勘探及工程地质勘察等钻孔以及各种混凝土结构检查孔。
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