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45 cr12 油钢 H13 Cr12mov SKD-11 136 P20718 skh-9模具圆钢棒
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CR12MOV模具钢D2440CDC53H13P20718圆钢4CR13S136HLD
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模具钢材45#Cr12MoVSKD11DC53P20718H13NAK80模具钢材料
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模具钢钢材CR12MOV板材h13熟p20718h圆钢工具钢板熟料钢棒
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精密45#Cr12MoVSKD11DC53模具钢板P20718H13S7S13640CR棒
现货S136H13SKD61精料P20718H8407头盔模具钢27381.2344光板
