Home / Standards / GB/T 12583-1998 GB/T 12583-1998 Active Standard test method for measurement of extreme-pressure properties of lubricating fluids(four-ball method) 润滑剂极压性能测定法(四球法) Standard Type GBT ICS 75.100 CCS E30 Status 现行 Issue Date 1998-12-08 Implementation 1999-05-01 Responsible Dept 国家标准委 Drafting Unit N/A