Presently, catalytic converter is the most effective equipment to emissioncontrol, 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 emissioncontrol on on-road motor vehicles such as automobiles, China started to follow the legislation process on off-road mobile equipment in Europe and USA.