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Ouhan180m 220m 260m 300m 500m Depth Crawler Pneumatic Rotary Blasting Borehole Core Portable Water Well Drill Drilling Rig for Rock/Mountain/Mining Area, Find Details and Price about Water Well Drilling Rig Drilling Rig from Ouhan180m 220m 260m 300m 500m Depth Crawler Pneumatic Rotary Blasting Borehole Core Portable Water Well Drill Drilling Rig for Rock/Mountain/Mining Area - Xingtai Ouhan Machinery Equipment Co., Ltd