shannxi hainaisen petroleum technology Co.Ltd

Date: 9th May 2016
81/2" HM352XA High Quality Center Bit fabrikanten standarder PDC Drill Bit til retningsbestemt boring
fabrikanten retningsbestemt boring,Website:http://www.pdcoiltool.com, hot salg, pdc borehoved, diamond borehoveder, olie oilfield
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