shaft sinking

短语词组

短语

• simultaneous shaft -sinking 一次成井
• shaft -sinking by freezing m-ethod 竖井冻结法掘进
• special shaft -sinking method 特殊凿井法
• combination shaft -sinking machine 立井联合掘进机
• water supply and shaft -sinking 供水凿井
• Shaft sinking -tool 井探
• drop -shaft sinking 沉井法
• Single -drum shaft sinking winder 单筒缠绕式凿井绞车
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