The sliding phenomenon between coal seam and its roof or floor is very common.
煤层及其顶底板中滑动现象极为普遍。
The solution is to build a sliding layer in the roof covering and wall space.
为解决这一问题，可在其屋面与墙面设置一个滑动层解决之。
The solution is to build a sliding layer in the roof covering and wall space.
为解决这一问题，可在其屋面与墙面设置一个滑动层解决之。
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