Home / Standards / GB/T 16749-1997 GB/T 16749-1997 Abolished Bellows expansion joints for pressure vessel 压力容器波形膨胀节 Standard Type GBT ICS 23.020.30 CCS J74 Status 废止 Issue Date 1997-03-04 Implementation 1997-08-01 Responsible Dept 国家标准委 Drafting Unit N/A