Home / Standards / GB/T 17490-1998 GB/T 17490-1998 Active Hydraulic fluid power--Identification of valve ports，subplates，control devices and solenoids 液压控制阀 油口、底板、控制装置和电磁铁的标识 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