rock stratum meaning in Chinese

岩层

Numerical analysis of creep pressing stress of casing in deep salt rock stratum
深井石油套管盐膏岩层蠕变挤压应力计算研究
Research on rationally arranging position of horizontal boreholes in roof rock stratum
顶板岩层水平长钻孔合理布孔层位的研究
Numerical simulation of failure process of overburden rock strata caused by mining excavation
采动影响下覆岩垮落过程的数值模拟
Collapse characteristics research on roof rock strata with 3dec in full - mechanized caving mining
焦作矿区煤层瓦斯合理预抽期的研究
Combined support of crossing point of roadway bottom slice and loose rock stratum with rockbolt net and bamboo curtain
底分层及松散岩层巷道交叉点锚网竹笆联合支护的研究

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