57 صفحه pdf
API TR 938-B:2008
Use of 9Cr-1Mo-V (Grade 91) Steel in the Oil Refining Industry
API TR 938-B:2008-Use of 9Cr-1Mo-V (Grade 91) Steel in the Oil Refining Industry
57 صفحه pdf
API TR 938-B:2008
Use of 9Cr-1Mo-V (Grade 91) Steel in the Oil Refining Industry