And the main kind of them is the structural bed, which consists of litho group, litho formation and litho member in the classification system.
构造岩层是其中主要类别，其单位等级体制可划分为岩群、岩组与岩段。
And the main kind of them is the structural bed, which consists of litho group, litho formation and litho member in the classification system.
构造岩层是其中主要类别，其单位等级体制可划分为岩群、岩组与岩段。
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