Home / Standards / YB/T 4917-2021 YB/T 4917-2021 Active 转炉炼钢一次烟气颗粒物测定技术规范 Standard Type YB ICS N/A CCS N/A Status Active Issue Date 2021-03-05 Implementation 2021-07-01 Centralized Committee 工业和信息化部 Issuing Authority 工业和信息化部