Home / Standards / GB/T 20502-2006 GB/T 20502-2006 Active Type denomination for membrane modules and devices 膜组件及装置型号命名 Standard Type GBT ICS 23.100.60 CCS J77 Status 现行 Issue Date 2006-09-04 Implementation 2006-12-01 Responsible Dept 市场监管总局 Drafting Unit N/A