Q/BQB 494-2021 Translated English of Chinese Standard. (QBQB494-2021): Cold-rolled steel strip for welded pipe use [Buy--download True-PDF in 3-second: https://play.google.com/books > Sign in > This BOOK > "3-dots" > Export > Save as "*.pdf"]BaoSteel: Cold-rolled steel strip for welded pipe use |