Home / Standards / GB/T 2541-1981 GB/T 2541-1981 Active Petroleum products--Computation table for viscosity indices 石油产品粘度指数算表 Standard Type GBT ICS 75.080 CCS E30 Status 现行 Issue Date 1981-03-25 Implementation 1981-07-01 Responsible Dept 国家标准委 Drafting Unit N/A