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Background背景资料针对世界环保要求的大趋势以及我国目前环境污染严重的事实,我国在提高汽油质量和标准制定上是跳跃式前进的,牌号升级、无铅化和组分优化同步进行。我国汽油无铅化的步伐很快,至2000年底,全国基本实现了车用汽油无铅化,并于1999年12月28日颁布了《车用无铅汽油》质量标准GB 17930-1999;为了提高汽油的清洁性,改善汽车尾气排
Background Background In response to the general trend of world environmental protection requirements and the fact that our country is currently suffering from serious environmental pollution, our country is leapfrogging in the development of gasoline quality and standards. The grades are upgraded, lead-free and component optimization are carried out simultaneously. The pace of lead-free gasoline in China is very fast. By the end of 2000, the country had basically realized the lead-free of motor gasoline and promulgated the quality standard GB 17930-1999 of “unleaded gasoline for vehicles” on December 28, 1999; Improve the cleanliness of gasoline, improve vehicle exhaust