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| effect of carbon on steel property (【技】含碳量的多少对钢材性能影响很大。含碳量增加，钢材强度和硬度增加，而钢材的塑性、韧性、冷弯性能和耐蚀能力下降，制作加工困难，冷脆性增加，焊接性能下降。) | |||
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