main roof caving

中文翻译老顶垮落

同义词释义

1)main roof caving,老顶垮落

2)main roof collapse,老顶垮落

3)main roof,老顶

4)upper roof,老顶

5)main roof,基岩老顶

6)grade of the old roof,老顶分级

7)old roof pressure,老顶来压

8)main roof boundary,老顶边界

9)main roof breaking,老顶破断

10)main roof,老顶岩梁

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