第四系 meaning in Chinese

quaternarysystem

Discussion on plans of dividing
对中国第四系中统划分方案的回顾与讨论
There are many salt dome structures within the salt sediment group
盐上层系?上二叠统一第四系。
Prediction of quaternary aquifer water inflow in mine shaft of liliangdian
李粮店第四系井筒涌水量预测
Analysis on examining engineering quality of djm composite foundation
第四系孔隙含水层下综放开采的研究
The bearing load characteristic of large diameter and super - long pile bored pile in quaternary soil
第四系土层大直径超长桩的承载特性

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