Home / Standards / YB/T 4251-2011 YB/T 4251-2011 Active 电梯门机用钢丝绳 Standard Type YB ICS N/A CCS N/A Status Active Issue Date 2011-12-20 Implementation 2012-07-01 Centralized Committee 工业和信息化部 Issuing Authority 工业和信息化部