Home / Standards / GB/T 7940.3-2001 GB/T 7940.3-2001 Abolished Pneumatic fluid power--Five-port directional control valves--Part 3:Code system for communication of valve functions 气动 五气口方向控制阀 第3部分:功能识别编码体系 Standard Type GBT ICS 23.100.30 CCS J20 Status 废止 Issue Date 2001-02-26 Implementation 2001-09-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A