Home / Standards / GB/T 7934-1987 GB/T 7934-1987 Abolished Hydraulic fluid power--Two-port slip-in cartridge valves--Cavities--Technical requirements 二通插装式液压阀 技术条件 Standard Type GBT ICS 23.100.30 CCS J20 Status 废止 Issue Date 1987-06-12 Implementation 1988-01-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A