shaft sinking

短语词组

短語

• simultaneous shaft -sinking 一次成井
• shaft -sinking by freezing m-ethod 竪井凍結法掘進
• special shaft -sinking method 特殊鑿井法
• combination shaft -sinking machine 立井聯郃掘進機
• water supply and shaft -sinking 供水鑿井
• Shaft sinking -tool 井探
• drop -shaft sinking 沉井法
• Single -drum shaft sinking winder 單筒纏繞式鑿井絞車
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