形掏槽 meaning in English

x cut

The norwegian cut can provide more dependable advance per round than the plough cut .
挪威掏槽与楔形掏槽相比，可以提供更可靠的每次爆破的进度。
The loosening holes outside the plough cut are also drilled at an angle which improves the breakage possibility .
在楔形掏槽眼外侧的扩槽眼也要有角度以改善爆破效果。
Deep hole v cut blasting technology for tunnel excavation
深孔楔形掏槽爆破技术在隧道掘进中的应用
Compound drum cut hole applied in deep borehole blasting of mine rock roadway
复式桶形掏槽在岩巷深孔爆破中的应用
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。