JIS G 3479-2015 5452 Steel tubes for machine structure with specified hardenability bands《具有特定淬透性带的机械结构用钢管》.pdf

相关资源

SAE J 1868-2010 Restricted Hardenability Bands for Selected Alloy Steels《选定的合金钢受限制的淬透性带》.pdf

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