Home / Standards / GB/T 34392-2017 GB/T 34392-2017 Active NC ring rolling machine 数控辗环机 Standard Type GBT ICS 25.120.10 CCS J62 Status 现行 Issue Date 2017-09-29 Implementation 2018-04-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A