Home / Standards / GBT 19789-2021 GBT 19789-2021 Packaging materials—Test method for oxygen gas permeability of plastic film and sheeting—Coulombic sensor method 包装材料 塑料薄膜和薄片氧气透过性试验 库仑计检测法 Standard Type GBT ICS N/A CCS N/A Status N/A Issue Date N/A Implementation N/A Responsible Dept N/A Drafting Unit N/A