Home / Standards / GB/T 7244-1987 GB/T 7244-1987 Active Single coil spring lock washers，Heavy type 重型弹簧垫圈 Standard Type GBT ICS 21.060.30 CCS J13 Status 现行 Issue Date 1987-02-05 Implementation 1988-02-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A