As emission regulations have become increasingly restrictive, diesel engine emission levels are approaching those of natural gas engines.
随着排放法规的日益严格，柴油机的排放水平逐渐接近天然气发动机。
As people pay more and more emphasis to energy and environmental protection, our nation has established strict non-road diesel engine emission regulation.
随着能源与环境问题持续受到关注，我国已经对非道路用柴油机制定了严格的排放标准。
With the attention increasingly given to environmental pollution, restriction of diesel engine emission in many countries is becoming more and more rigorous.
随着人们对环境污染重视程度的提高，世界各国对柴油机排放的限制也日益严格。
This paper describes the design of a total flow dilution system for the engine particle emission measurement. This system meets the requirement of vehicle engine emission measurement.
本文设计了一种发动机排放测量全流稀释系统，可以满足车用发动机排放测量需要。
Engine emission regulations and fuel consumption regulations are increasingly stringent with the deterioration of global climate and the growing shortage of oil resources.
随着全球气候恶化及石油资源的日益短缺，发动机的排放法规和油耗限制法规也日趋严格。
Engine emission regulations and fuel consumption regulations are increasingly stringent with the deterioration of global climate and the growing shortage of oil resources.
随着全球气候恶化及石油资源的日益短缺，发动机的排放法规和油耗限制法规也日趋严格。
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