shannxi hainaisen petroleum technology Co.Ltd

Date: 20th February 2016
83/4" HM662XA PDC laum tom, PDC Cutter rau Machinery Carbide khoom/Oilfield PDC laum ntsis/Drilling Mining Rigs PDC laum khoom
PDC tho ntsis, mining machinery, Carbide khoom, Oilfield PDC tho ntsis, High zoo pdc laum ntsis matrix cev
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