Home / Standards / GB/T 39027-2020 GB/T 39027-2020 Active High strength and modulus polyimide filament yarns 高强高模聚酰亚胺长丝 Standard Type GBT ICS 59.060.20 CCS W52 Status 现行 Issue Date 2020-07-21 Implementation 2021-02-01 Responsible Dept 国家标准委 Drafting Unit N/A