Home / Standards / GB/T 9074.28-1988 GB/T 9074.28-1988 Active Countersunk external toothed lock washer for assembly 组合件用锥形锁紧垫圈 Standard Type GBT ICS 21.060.30 CCS J13 Status 现行 Issue Date 1988-04-16 Implementation 1989-01-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A