Home / Standards / GB/T 2514-2008 GB/T 2514-2008 Active Hydraulic fluid power - Four-port directional control valves - Mounting surfaces 液压传动 四油口方向控制阀安装面 Standard Type GBT ICS 23.100.50 CCS J20 Status 现行 Issue Date 2008-02-28 Implementation 2008-08-01 Responsible Dept 中国机械工业联合会 Drafting Unit 中国机械工业联合会