Unleaded petrol gasoline for motor vehicles 车用无铅汽油
2.
State general bureau of environmental protection approved the national standard of automobile - used unleaded petrol " in june of 1999 . the standard is gb17930 - 1999 . the index most difficult to reach is the content of olefin in this standard 国家环保总局于1999年6月批准发布了《车用无铅汽油》国家标准gb17930 - 1999 ，该标准中最难达到的指标是烯烃含量。
