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SPM DHD112 dhd 112 dhd 10 inch DTH hammer cir Down the hole drilling bits for oil well. US 4285-8148 Piece. 1 Piece (Min. Order) CN Xuanhua Superman DTH Machinery Co., Ltd. 3 YRS. ... M60 mining dth bit down the hole drill bit for mining drilling. US 400.00 Piece. 5 Pieces (Min. Order) CN Changsha Tianhe Drilling Tools And Machinery Co ...
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