room and pillar method的意思|示意

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room and pillar method相关短语

1、 Regular Room And Pillar Method 留规则矿柱法

2、 Irregular Room And Pillar Method 留不规则矿柱法

3、 room and pillar mining method 房柱式开采

4、 room-and-pillar mining method 房柱采矿法

5、 Room and pillar filling method 分矿房矿柱分层充填法

6、 wide propelling room-and-pillar mining method 宽进路推进杆柱房柱法

7、 pillar-and-room method 房柱法

8、 pillar and room method 盘区房柱法

9、 mining by pillar-and-room method 房柱法开采