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High Torque Yt29A Pneumatic Air Leg Rock Drill, Mining Jack Hammer for Hard Rock, Tunnel and Quarry Drilling, Find Details and Price about Rock Drill Leg Rock Drill from High Torque Yt29A Pneumatic Air Leg Rock Drill, Mining Jack Hammer for Hard Rock, Tunnel and Quarry Drilling - Tianshui Yanfeng Rock Drilling Machinery Equipment Co., Ltd.