shannxi hainaisen petroleum technology Co.Ltd

Date: 20th February 2016
83/4" HM952XA 222.2 tollise terasest keha Oil Well Pdc Drill Bit Pdc Bit
?li h?sti pdc drill bit, API-standardi, Veekaevude puurimine, professionaalne drill bit, diamond drill bit, tegi Hiina drill bit
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