... chamber charge 洞室装药 chamber mining 房式开采 chambering 炮眼掏壶 ...
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... 房柱法:room-pillar method 房式开采:room mining 防坠器断绳保险器:holding apparatus ...
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短语
房柱式开采法
board and pillar method
;
bord and wall method
;
heading and stall system
;
stoop and room
房柱式开采
room and pillar mining
;
pillars mining
-
room mining
- 引用次数:1
参考来源 - 房柱式开采体系煤柱回收关键技术研究
chamber mining
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