bench excavation
短語詞組
- rock bench excavation 巖臺(tái)開挖
- heading and bench excavation 導(dǎo)洞與臺(tái)堦開挖
- top heading and bench excavation 上下臺(tái)堦開挖
- Tri -bench excavation method 三臺(tái)堦開挖法
- three -bench seven-step excavation method 三臺(tái)堦七步開挖法 返回 bench excavation