Home / Standards / GB/T 12777-2008 GB/T 12777-2008 Abolished General specification for metal bellows expansion joints 金属波纹管膨胀节通用技术条件 Standard Type GBT ICS 47.020.30 CCS U50 Status 废止 Issue Date 2008-08-04 Implementation 2009-02-01 Responsible Dept 国家标准委 Drafting Unit 国家标准委