采用一套车载尾气测试系统，对选取的6辆代表性车辆在宁波市实际道路行驶中的瞬时排放进行测试。

Using a set of on-board vehicle emissions test system, 6 selected typical vehicles were tested on urban roads in Ningbo.

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本论文提出一种新的测试方法，并在此方法上研制出基于车载式的汽车尾气排放测试系统。

In this paper, a new type of measurement method is presented. Based on the method an on-board vehicle exhaust emission test system is developed.

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基于此种情况，研究设计了汽车尾气降解材料测试室。

According to this situation, we study and design the degenerating materials' testing chamber on Automobile exhaust.

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