Home / Standards / YB/T 5220-2014 YB/T 5220-2014 Active 非机械弹簧用碳素弹簧钢丝 Standard Type YB ICS N/A CCS N/A Status Active Issue Date 2014-10-14 Implementation 2015-04-01 Centralized Committee 中国钢铁工业协会 Issuing Authority 中国钢铁工业协会