X40CrM0V5-1元钢材67SiGr5_G20CrNi2M0_2Gr12NiMoWV圆钢棒材4Gr13
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67SiGr5材料X2CrNiM018-15-4圆棒2Cr12M0V钢材X2GrNiMo17-12-2棒
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