rapid excavation meaning in Chinese

快速开挖

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
Rapid excavation of conveyor gateway for fully mechanized high cutting coal mining face
大采高综采工作面运输顺槽的快速掘进
Rapid excavation technology applied in conveyer gateway of bottom slicing coal mining face
下分层工作面运输巷快速掘进施工技术
Rapid excavation construction technique of gate shaft for right diversion tunnel of xiluodu hydropower station
溪洛渡右岸导流洞大型闸门竖井快速掘进技术