短語(yǔ)詞組

短語(yǔ)

• rock bench excavation 巖臺(tái)開(kāi)挖
• heading and bench excavation 導(dǎo)洞與臺(tái)階開(kāi)挖
• top heading and bench excavation 上下臺(tái)階開(kāi)挖
• Tri -bench excavation method 三臺(tái)階開(kāi)挖法
• three -bench seven-step excavation method 三臺(tái)階七步開(kāi)挖法
返回 bench excavation