room mining meaning in Chinese
房式开采
Examples
- Mining practices on coal pillar and room mining under two goaf and highway bridge
基于上覆两层采空区的公路桥煤柱条带开采 - Research of large diameter long - hole sublevel room mining in zijinshan gold - copper mine
紫金山金铜矿大直径深孔阶段矿房法的试验