Home / Standards / GB/T 27725-2011 GB/T 27725-2011 Active Butterfly valves of thermoplastics materials 热塑性塑料蝶阀 Standard Type GBT ICS 83.140.30 CCS G33 Status 现行 Issue Date 2011-12-30 Implementation 2012-07-01 Responsible Dept 中国轻工业联合会 Drafting Unit 中国轻工业联合会