Home / Standards / YS/T 446-2011 YS/T 446-2011 Active 钎焊式热交换器用铝合金复合箔、带材 Standard Type YS 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