Home / Standards / GB/T 31557-2015 GB/T 31557-2015 Active High speed CNC gantry-type engraving and milling machine with fixed crossbeam 高速数控定梁龙门雕铣机 Standard Type GBT ICS 25.040.20 CCS J54 Status 现行 Issue Date 2015-05-15 Implementation 2016-01-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A