Home / Standards / GB/T 20738-2018 GB/T 20738-2018 Active Rooftop air conditioning unit 屋顶式空气调节机组 Standard Type GBT ICS 27.200 CCS J73 Status 现行 Issue Date 2018-05-14 Implementation 2018-12-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A