Home / Standards / GB/T 1995-1998 GB/T 1995-1998 Active Petroleum products--Calculation of viscosity index 石油产品粘度指数计算法 Standard Type GBT ICS 75.080 CCS E30 Status 现行 Issue Date 1998-08-20 Implementation 1999-01-01 Responsible Dept 国家标准委 Drafting Unit N/A