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40cr调质45号光板P20模具钢CR12
模具钢材Cr12MoV 铬12钼钒光圆 圆棒直径2.3-440mm零切 Cr12圆钢
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45#号光板精板圆钢DC53加工SKD11铣磨q235铁板P20模具钢材Cr12mov
45号钢板p20模具钢材cr12mov光板精板dc53圆棒h13精料40CR A3
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45#号光板精板P20模具钢材Cr12mov圆钢DC53加工SKD11铣磨q235铁板
