Home / Standards / GB/T 39958-2021 GB/T 39958-2021 Active CNC hole puncher 数控冲孔机 Standard Type GBT ICS 25.120.10 CCS J62 Status 现行 Issue Date 2021-03-09 Implementation 2021-10-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A