room and pillar system的意思|示意
房柱系统
room and pillar system的网络常见释义
房柱法 ... room and pillar mining 房柱式开采 room and pillar system 房柱法 room face 矿房工祖 ...
room and pillar system相关短语
1、 shallow hole room-and-pillar mining system 浅孔房柱采矿法
room and pillar system相关例句
Based on field observations and theoretical analyses, the characteristic of periodic caving of immediate roof and main roof in a room and pillar system was analyzed.
通过理论分析和现场实测，对房柱式采煤的矿压显现规律及其特点进行了探讨。