shaft boring
短語詞組
- shaft t boring 鉆井
- Shaft boring machines 礦用鉆井機(jī)
- shaft sinking by boring 鉆井法鑿井
- shaft boring detail 豎井鉆進(jìn)
- shaft boring machine 豎井掘進(jìn)機(jī)
- shaft boring through clay layer 粘土層鉆井
- full face shaft boring machine 豎井鉆機(jī) 返回 shaft boring