... 3.1 有效寿命 useful life 3.2 排气后处理系统 exhaust aft ertreatment system 3.3 降氮氧化物（deNOx） 系统 deNOx system ...
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最后将集成的排气后处理系统装在一辆客车上，并进行了道路实车实验。
The aftertreatment system was installed on a bus and the road running emissions were measured.
试验结果表明，微粒后处理系统对柴油机排气微粒具有一定的净化效果，净化率在50% - 75%。
The test result shows that a certain purifying effect on the Diesel exhaust particulate can be obtained from the system with purifying rate of 50 % - 75 %.
公司主要从事排气系统的开发、生产和销售，产品包括：排气歧管，催化转换器、消声器以及领先的柴油后处理系统。
The company is mainly engaged in the development, production and sales of emission control system including manifold, catalytic converter, muffler and diesel after-treatment system.
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