The main component of the system, the exhaust fan, can not be polluted by the soot, needs no cleaning, and has the advantages of simple maintenance, long service life and good soot separating effect.

系统中主要部件排风机将不会受到油污的污染，且不需清洗，具有维护简单，使用寿命长和油烟分离效果高的优点。

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An exhaust gas-purifying catalyst includes a carrier, and an active component formed of a noble metal, carried by the carrier.

本发明涉及排气净化催化剂，其含有由载体及通过所述载体负载的贵金属组成的活性成分。

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One of the pollutants was a fine particulate substance known as PM2.5, a major component of diesel exhaust which EPA had determined to be unsafe for inhalation at any level, particularly for health-impaired and elderly populations.

FORBES: EPA Charged With Lethal Experiments On Hundreds Of Unsuspecting Subjects