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400m Depth Reverse Circulation/Big Diameter Drilling/Drill Rig Machine Use for Water Well/Clay/Loam/Silty Soil Layer/Silty Sand Layer Drill machinery

400m Depth Reverse Circulation/Big Diameter Drilling/Drill Rig Machine Use for Water Well/Clay/Loam/Silty Soil Layer/Silty Sand Layer Drill machinery
Product Description        HF-400L Reverse Circulation Rig1. The rig adopts engineering crawler, hydraulic walking...

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