["Сравнительный анализ стандартов автомобильного бензина в США,欧盟 22015欧洲 2205日本",,"Сравнительный анализ стандартов автомобильного бензина в США,欧盟 22005欧洲 2205日本多年来主要指标的变化显示：从长远来看，汽油硫含量、烯烃含量、芳烃含量和苯含量均呈现下降趋势，但下降的速度不同。汽油硫含量下降速度最快；苯含量要求非常严格，变化较小；烯烃含量变化不大；芳烃含量有所下降，但下降速度相对较慢。从具体指标上看，三者存在明显差异。为什么会出现如此明显的差异呢？下面分别就汽油硫含量、烯烃含量、芳烃含量、苯含量和辛烷值指标进行对比分析。 表1 美欧日汽油标准对比 指标US9FG 22

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