构件群体
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structural member group
构件组
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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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