230 صفحه pdf
ANSI/API 7G-2:2015
Recommended Practice for Inspection and Classification of Used Drill Stem Elements
ANSI/API 7G-2:2015-Recommended Practice for Inspection and Classification of Used Drill Stem Elements
230 صفحه pdf
ANSI/API 7G-2:2015
Recommended Practice for Inspection and Classification of Used Drill Stem Elements