shannxi hainaisen petroleum technology Co.Ltd

Date: 14th November 2015
83/4"HM662XA PDC Drill Bit, PDC Cutter For Mining Machinery Carbide Bits/Oilfield PDC Drill Bit/Drilling Rigs PDC Drill Bits
PDC drill bit,mining machinery, Carbide Bits,Oilfield PDC Drill Bit,High quality pdc drill bit matrix body
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