shannxi hainaisen petroleum technology Co.Ltd

Date: 20th February 2016
81/2" HM962XA PDC Drilling khoom, tho cuab yeej nrog Matrix cev rau dej zoo Drilling
Zoo pdc tho khoom /Original tsum nquag roj PDC ntsis PDC Matrix cev ndais roj /tungsten carbide PDC THO ntsis
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