1)rock specimen,岩柱2)Waterbarrier,防水岩柱3)Deepening rock pillar,延深岩柱4)demolishing rock pillar,岩柱拆除5)safety pillar under water bodies,煤岩柱6)Lime rock specimen,石灰岩柱
用法例句
Based on the hydrogeological conditions,coal seam roof,rock mechanics in Wujia coalfield,author advance that safety pillar under water bodies can be shorted,mining level can be raised,and expound the way of construction.