Home / Standards / GB/T 34878-2017 GB/T 34878-2017 Active Vacuum technology—Valves—Leak test 真空技术 阀门 漏率测试 Standard Type GBT ICS 23.160 CCS J78 Status 现行 Issue Date 2017-11-01 Implementation 2018-05-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A