shaft boring

短语词组

短語

• shaft t boring 鑽井
• Shaft boring machines 鑛用鑽井機
• shaft sinking by boring 鑽井法鑿井
• shaft boring detail 竪井鑽進
• shaft boring machine 竪井掘進機
• shaft boring through clay layer 粘土層鑽井
• full face shaft boring machine 竪井鑽機
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