然后介绍了车辆试验场及试验道路的研究现状，综述了确定强化系数的各种方法。
Secondly, the research situation of vehicle proving ground and test roads was discussion, and the various methods of deter- mining enhancement coefficient were summarized.
糯扎渡水电站大坝所处地段的河谷系数小，施工条件差，上坝道路布置困难。
The dam for the Nuozhadu Hydropower Station is located in an area with small valley coefficient, poor construction conditions and difficult arrangement of access roads to dam crest.
利用底盘测功机模拟道路滑行试验，测定出汽车的传动系阻力、轮胎滚动阻力及它们的速度影响系数。
A coasting performance test is simulated on a chassis dynamometer, the transmission resistance, rolling resistance of wheels and their speed factors are measured.
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