- stacking drilling tower
- 堆叠: pile one above another; pile ...
- 钻塔: derrick; rig; drill tower; b ...
- 套叠钻塔: telescopic derrick
- 钻塔: derrick; [机械工程] rig; drill tower; [矿物学] boring tower
- 堆叠: pile (sth.) one above [on] another; pile sth. on one another; pile up; heap up
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