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API 7-1 Drilling hlua li qub
Lub laum txoj hlua nres cov kua dej los ntawm kev ntws los ntawm txoj hlua tho feem ntau yog tias lub laum ncaws nrog lub ntsis tawm hauv qab.LANDRILL tuaj yeem muab cov khoom zoo siab qhib kev ruaj ntseg valve (FOSV), Kelly valve, Hauv tshuab hluav taws xob tiv thaiv (IBOP), Tso rau hauv kos valve , ntab valve.
Room 703 Building B, Greenland center, Hi-tech development Zone Xi'an, Suav teb
86-13609153141
