GB/T 3077-2015 Translated English of Chinese Standard. (GBT 3077-2015, GB/T3077-2015, GBT3077-2015): Alloy Structure Steels [Buy--download True-PDF in 3-second: https://play.google.com/books > Sign in > This BOOK > "3-dots" > Export > Save as "*.pdf"]
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