Home / Standards / GB/T 34489-2017 GB/T 34489-2017 Active Aluminium alloys extruded profiles and sheets for roofing structure 屋面结构用铝合金挤压型材和板材 Standard Type GBT ICS 77.150.10 CCS H61 Status 现行 Issue Date 2017-10-14 Implementation 2018-05-01 Responsible Dept 中国有色金属工业协会 Drafting Unit N/A