Home / Standards / GB/T 944.1-1985 GB/T 944.1-1985 Active Cross recesses for screws 螺钉用十字槽 Standard Type GBT ICS 21.060.10 CCS J05 Status 现行 Issue Date 1985-08-01 Implementation 1986-06-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A