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简介:ZC2520M3N6JFS45Cr圆钢,45Cr钢板,45Cr钢管,45Cr合金钢,45Cr合金管,45Cr合金板,40Cr钢材 45Cr,合金结构钢。统一数字代号:A20452 标准:GB/T 3077-1988化学成分  质量分数)(%
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