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弹簧钢SUP11 SUP9A G65MN 53Si2MNB 51CRV4 AISI1084 070A72 零切
60SI2MN弹簧钢50crv4弹簧钢板805H60圆棒53Si2MNB弹簧钢带
CK71弹簧钢板A22603软态硬态90CRVA 50CRV3钢带53Si2MNB圆棒
60Si2CrVA弹簧钢50crv4弹簧钢板805H60圆棒53Si2MNB弹簧钢带