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Kingdream 8 1/2' MD517G high speed motor rotary drilling metal sealed TCI tricone drill bits. US 500.00-10000 Piece. 1 Piece (Min Order) 7 YRS Urumqi Siruite Mechanical Equipment Co., Ltd. ... 12 1/4 tci rotary tricone drill bit for hard rock well drilling. US 300.00-1999 Piece. 1 Piece ...
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