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| H439 铬镍钴耐热钢 (0.4C, 0.6Si, 1.5Mn, 20Cr, 30Ni, 5Mo, 30Co, 2Ta); H439 铬镍钻耐热钢碳0.4%,硅0. 6%,锰1. 5%,铬20%,镍30%,钼 5%，钻 30%，钽 2% | |||
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