original post: https://redd.it/12agiks

5CrMnMo、5CrNiMo、4CrMnSiMoV、5Cr2NiMoVSi、4Cr5MoSiV、4Cr5MoSiV1、4Cr5W2VSi、3C...

u_Gaogaosteel by Gaogaosteel

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