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Good Quality 14 3/4 inch Steel Tooth Bit Rotary Rock Roller Bit Tricone Drill Bit For Well Drilling Hebei Yichuan Drilling Equipment Manufacturing Co., Ltd. US 1000-1200 Piece
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Good Quality 14 3/4 inch Steel Tooth Bit Rotary Rock Roller Bit Tricone Drill Bit For Well Drilling Hebei Yichuan Drilling Equipment Manufacturing Co., Ltd. US 1000-1200 Piece
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Get PriceCheap Bore hole drilling machine with drill pipe and drill bit Machine Introduce : Down-the-hole drilling rig is an impact rotary drilling rig. Its internal structure is different from that of a general rock drill. Its gas distribution and piston reciprocating mechanism are independent, that is, an impactor.
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