main roof collapse 老顶垮落
extensive roof collapse 区域性切冒
stope roof collapse 采场冒顶
tunnel roof collapse 巷道顶板冒落
Stope roof collapse forecast 冒顶预报
collapse of roof 顶板崩落
roof fall and wall collapse 冒顶片帮
collapse roof 压塌屋顶
In Massachusetts, the weight of the snow caused a partial roof collapse at this garage.
在马萨诸塞州的这个车库,积雪的重量使得部分房顶倒塌。
Due to the special geologic conditions of Jinchuan mining area, the phenomena of roof collapse in local drifts is quite common.
金川矿区由于其特殊的地质条件,巷道局部发生冒顶的现象较多。
Hundreds of rescuers in southern Germany are desperately searching Tuesday for survivors of a roof collapse at an ice-skating rink in Bavaria.
数百名救援人员星期二在德国南部的巴伐利亚的一处滑冰场竭尽全力搜寻屋顶塌陷事件幸存者。
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