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The problems of tunnel gushing and earthfall in Baoxing deep buried large hydraulic tunnel are obvious.
宝兴水电站引水隧洞为深埋特长隧洞,涌水塌方问题突出。
n. 塌方
The problems of tunnel gushing and earthfall in Baoxing deep buried large hydraulic tunnel are obvious.
宝兴水电站引水隧洞为深埋特长隧洞,涌水塌方问题突出。