Home / Standards / GB/T 29001.4-2012 GB/T 29001.4-2012 Active Numerical control system of machine tool - Protocol specifications for NCUC-Bus fieldbus - Part 4：Application layer 机床数控系统 NCUC-Bus现场总线协议规范 第4部分：应用层 Standard Type GBT ICS 25.040.20 CCS J50 Status 现行 Issue Date 2012-12-31 Implementation 2013-07-01 Responsible Dept 中国机械工业联合会 Drafting Unit 中国机械工业联合会