Under the new rule, by 2015, existing boilers must switch from No. 6 oil to a low-sulfur version of the No. 4 heating oil or to an equivalent cleaner fuel.

按照这项新法规，截止2015年，现存锅炉必须由6号燃料油换成4号低硫型燃料油或与之相当的较为清洁的燃料。

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Bohai 36 1 crude is classified to low sulfur naphthenic base crude oil, which is a good feedstock for producing high grade road asphalt.

渤海36 1原油属低硫环烷基原油，是生产优质道路沥青的良好原料。

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Some cities have passed laws that allow coal and oil to be burned only if their sulfur content is low.

一些城市已通过法律，允许煤炭和石油只有在其被烧毁硫含量低。

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The reactor, according to Petrobras, was built with technology to produce oil with low sulfur content, respecting the new environmental standards on fuel quality.

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