cost of upkeep,cost of maintenance是什么意思

用法例句

In this paper, from the viewpoint of technical economics, the construction cost, maintenance cost and vehicle transportation cost of different axle 條oad limits in the main highway of Hebei province are analyzed, and the method of selecting the reasonable axle-load limit was put forward.

本文以河北省干线公路为分析对象，从技术经济学角度出发，分析了不同轴限对公路建设费用，公路养护费用及车辆运输成本的影响，并提出了选择合理轴限的选择方法。