Home / Standards / GB/T 17487-1998 GB/T 17487-1998 Active Hydraulic fluid power--Four-and five-port servovalves--Mounting surfaces 四油口和五油口液压伺服阀 安装面 Standard Type GBT ICS 23.100.30 CCS J20 Status 现行 Issue Date 1998-09-02 Implementation 1999-08-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A