牌號(hào) | 20Cr |
---|---|
對(duì)應(yīng)標(biāo)準(zhǔn) | GJB 1220A-2008
火炮零件用合金結(jié)構(gòu)鋼棒規(guī)范 Speification for alloy structure steel bar for artillery parts |
歸類 | 合金鋼 |
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