Presently, catalytic converter is the most effective equipment to emission control, which can reduce harmful ingredient of automobile emission.

催化转化器能减少汽车排放物中的有害成分，是目前最有效的汽车排放控制装备。

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After successful implementation of the emission control on on-road motor vehicles such as automobiles, China started to follow the legislation process on off-road mobile equipment in Europe and USA.

中国在顺利对汽车等公路用机动设备实施排放法规后，开始仿效欧美加快了非公路机动设备排放法规的立法步伐。

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