hard rock mining的例句大全

These are useful in hard rock mining where high brisance, high shattering effects, are desired.

这种炸药,对需要高威力 、 高破碎效应的坚硬岩石矿, 是有用的.

Caving mining under the condition of hard coal and rock

坚硬煤岩条件下放顶煤开采

Xinli mining area of Sanshandao gold deposit is the first hard rock mine which belongs to the under-sea deposit in our country, and only Longkou is mining coal under sea in domestic.

三山岛金矿新立矿区是我国第一个进行海底采矿的硬岩矿山，国内仅龙口在海下采煤。

Hard Rock Mechanics Problems in Deep Mining and Their Aanalysis Methods

深部硬岩开采的岩石力学问题及其分析方法

bit, use in geological exploration and coal mining on soft rock layer and medium-hard rock layer.

适用于软岩层，中硬岩层地质勘探，煤矿采掘的小规格的冲击钻地球齿。

In North America, heavy-mining and hard-rock mining are the occupations most frequently associated with chronic silicosis.

的粉尘引起的.在北美地区, 重金属矿和石矿是慢性硅肺的主因.

count-measures of rock burst under the condition of hard ore deep mining

硬岩矿床深井开采岩爆预防措施