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45#号光板 H13 4Cr13圆棒 P20钢板DC53 S136模具钢材 Cr12MoV圆钢
模具钢材45#号钢板CR12MOV圆钢SKD11圆棒DC53 S136 H13 P20材料D2
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优质模具钢3CR13 1CR17 2344 FT64H 718 CRWMN DC11 Cr12MoV圆钢
