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石墨化钼钢
met. Graph-Mo (低钼:1.25〜 1.55C,0.75 ~ 1.0Si, 0.35 〜0.6M0, < 0.25Cr,余量 Fe;高钼:1.35 ~ 1.55C, 0.85~1.2Si,0.2~0.3Cr,余量 Fe); graphitized molybdenum steel