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垮落法控制顶板
meaning in Chinese
caving method roof control
cavingmethodroofcontrol
Related Words
垮
垮落
垮塌
垮下来
压垮
垮掉
垮坝
垮了
垮下
自然垮落
垮落
垮落采煤法
垮塌
垮塌载荷
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