pillar extraction
短語(yǔ)詞組
- Three pillar extraction panels 三大支柱提取板;三個(gè)支柱提取面板;三個(gè)柱子提取盤(pán)區(qū);三個(gè)支柱開(kāi)采板
- partial pillar extraction 部分支柱提取;部份柱子提取
- shaft pillar extraction 井筒煤柱開(kāi)采
- bottom pillar extraction 底柱回采
- Ore pillar extraction 礦柱回采
- pillar extraction drilling 煤柱回采鉆眼
- pillar extraction methods 支柱提取方法
- cap pillar extraction 頂柱回采
- The mine commenced pillar extraction 該礦展開(kāi)支柱提取;礦井展開(kāi)支柱提取;排雷的支柱開(kāi)始提取;礦開(kāi)始的柱子提取 返回 pillar extraction