rock stratum

常见例句

An aquifer is a water-bearing rock stratum such as sandstone and chalk.
地下蓄水层是一些有水的岩石层，如沙岩和白垩岩。
Grouting is a rock-stratum strengthening method that fill up the voids and fractures with cement or other materials.
注浆是将水泥或其它材料注入岩土体缝隙中的一种岩层加固方法。
According to the difference of water-bearing rock stratum, sectional pumping testing is adopted, and permeability coefficients are calculated in different burying depth section.
隧道设计与施工，查明围岩岩层的透水性十分必要，该深埋隧道勘探工程，根据含水岩层的差异，采取分段抽水试验方法，计算出不同埋深段的岩层渗透系数。