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随着全球工业高度发展,环保已经成为人们最为关注的问题之一,各国家和地区都先后推出了本地的环保法规来保护我们的地球。然而在城市大气污染中汽车和工程机械的污染是不可忽视的一部分,发达的国家首先在汽车上执行了排放法规,而后在工程机械等其它内燃机动力设备上执行。我国
With the rapid development of global industry, environmental protection has become one of the most concerned issues of people. All countries and regions have successively introduced local environmental regulations to protect our planet. However, the pollution of automobiles and construction machinery in the urban air pollution is an insignificant part. Developed countries implemented emission regulations first in automobiles and then on other internal combustion engine power equipment such as construction machinery. My country