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Bit Drilling ND4 ND5 ND6 ND8 ND10 ND12 ND Series Middle And High Pressure DTH Hammer Bit Drill Bit Drilling Tool ... Three Wings Middle and High Pressure DTH Hammer Bit 203mm for Plastic Casing. US 1500 Piece. 1 Piece (Min. Order) Shenyang ABT Drilling Equipment Co., Ltd. ... Drilling bits water well 100-500mm Three-Wing Drill Bit. US 60.00 ...
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