Home / Standards / GB/T 4455-2019 GB/T 4455-2019 Active Polyethylene blown covering film for agriculture 农业用聚乙烯吹塑棚膜 Standard Type GBT ICS 83.140.10 CCS G33 Status 现行 Issue Date 2019-12-10 Implementation 2020-07-01 Responsible Dept 中国轻工业联合会 Drafting Unit N/A