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incompetent bed
archit. 弱胶结地层
desert. 弱岩层
dril. 松散岩层
hydroel.st. 软弱岩层
oil 软岩层
tech. 弱岩层; 软弱岩层; 软弱夹层; 松软岩层; 不稳固岩层

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