deep-buried pressure cavern 深埋承压硐室
deep cavern
深洞穴
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The mechanical properties of columnar jointed rock mass, which is the main composition of dam foundation and surrounding rock of deep cavern at Baihetan hydropower station, are very complex.
白鹤滩水电站坝基基岩及深部洞室围岩以柱状节理岩体为主，其力学特性极其复杂。
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