Drill rig and its accessory tools were developed to meet the technical requirements of drilling Geo physical blast holes in soil and rock among mountainous and hilly area in China.
A simple working platform for underwater drillingblast and the practical method to removing and orientating the ship are introduced in the paper.
文章介绍了一种简易的水下钻孔爆破施工平台及实用的移船定位方法，改进了传统的药包加工及装填工艺。
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Drillers in this unit group operate mobile drilling machines to bore blast holes in open-pit mines and quarries and to bore holes for blasting and for building foundations at construction sites.