shannxi hainaisen petroleum technology Co.Ltd

Date: 2nd March 2016
12 1/4" HS652XA terasest keha Pdc Diamond bitti suurusega/API Oil Well Pdc Drill Bit
terasest keha, pdc drill bit, diamond drill bit, 5 tera drill bit, ?herealised drill bit, liivakivi Puur
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