Peripheral rock large deformation is a kind of great hazardous geology casualty of underground engineering.

围岩大变形是地下工程中危害极大的一种地质灾害。

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Peripheral rock large deformation is a kind of great hazardous geology casualty of underground engineering.

围岩大变形是地下工程中危害极大的一种地质灾害。

youdao