房柱采矿法
- 网络room-and-pillar method; Room-and-pillar system
房柱采矿法房柱采矿法
room-and-pillar method
采矿专业英语大全 - 豆丁网 ... 防水闸门 water door 房柱采矿法 room-and-pillar method 放矿计划图表 chart of ore drawing ...
Room-and-pillar system
房柱采矿法,Room... ... ) Room-and-pillar system 房柱采矿法 ) Shallow hole room-and-pillar mining system 浅孔房柱采矿法 ...
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