Home / Standards / GB/T 31976-2015 GB/T 31976-2015 Active Aluminium alloy sheets used for sound-absorbing composite panel with through-hole 复合通孔吸声用铝合金板材 Standard Type GBT ICS 77.150.10 CCS H61 Status 现行 Issue Date 2015-09-11 Implementation 2016-08-01 Responsible Dept 中国有色金属工业协会 Drafting Unit N/A