最后，以CF6型发动机送修维修等级决策规则生成为例，说明该决策方法的有效性。
At last it illustrated value of the method by making the decision rules of CF6 engine"s maintenance level as example."
微波加热和红外加热现已逐渐应用到高等级公路沥青混凝土路面养护和维修中。
Microwave heating and infrared ray heating are used in maintenance of asphalt concrete pavement of high grade expressways.
随着我国公路建设的发展，公路养护维修的多种任务也伴随而来，尤其是我国修建的一些高等级公路已进入中修或大修期。
With the development of highway construction, road maintenance is also accompanied by a variety of tasks, in particular, some highways have entered a period of repair or overhaul.
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