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56mm 60mm 65mm 75mm 92mm 113mm 133mm 153mm 160mm 180mm 203mm PDC Core Drill Bit for Water Well, US $ 25 - 200 / Piece, Henan, China, Drills-King, DXQK56-153.Source from Henan Drills-King Mining Technology Co., Ltd. on Waimaotong.com.