快速掘进 meaning in Chinese

high-speed drivage
high-speeddrivage
quick tunneling
speedy drivage

New methed of quick excavation construction in super - deep shaft
超深竖井快速掘进施工新方法
Several pretensions on quick advancement at hard heading with big fault
大断面岩巷快速掘进的几点体会
Application of smooth blasting technology in excavating broken rock
技术及中深孔爆破技术实现岩巷快速掘进
Medium deep borehole smooth blasting applied to rapid excavation in xinsan mine
中深孔光面爆破在新三矿快速掘进中的应用
Improvement and study of the shotcrete robot and quick tunnelling production line
喷浆机器人的改进及快速掘进作业线的研究

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