掘进效率 meaning in Chinese

drivage efficiency

Study on improving efficiency of heading advance in kafang mine
提高卡房采选厂巷道掘进效率研究
Due to its uncontinuity of operation , its tunneling efficiency is greatly influenced
由于其作业的不连续性，影响了其掘进效率的发挥。
Study on test of improving quality of gate excavation and boosting efficiency of roadway excavation through hard rock
增加硬岩巷道掘进效率的试验研究
Theoretical discussion and practices to improve blasting and heading efficient rate in mine deep rock roadway
提高深部岩石巷道爆破掘进效率的理论探讨与实践
In order to solve the shortcoming of traditional explosion w ; dge - shaped excavation in da ' anshan mine , improve the rate of excavation and reduce the consumption of explosive materials , a series of excavation shapes are applied and experimented in the rock tunnel excavate
针对大安山煤矿传统的楔形掏槽爆破方式存在的弊端，本文提出在该矿进行新型掏槽实验研究，用以增加岩石巷道掘进效率和减少掘进爆破材料消耗。

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