Home / Standards / GB/T 33774-2017 GB/T 33774-2017 Active Gas for electronic industry—Propylene 电子工业用气体 丙烯 Standard Type GBT ICS 71.100.20 CCS G86 Status 现行 Issue Date 2017-05-31 Implementation 2017-12-01 Responsible Dept 国家标准委 Drafting Unit N/A