本问题是要来计算：在一个所有街道都为单行线的城市中，一辆急救车可以通行的路径的数量。
This problem involves determining the number of routes available to an emergency vehicle operating in a city of one-way streets.
本研究在分析线路平纵横断面参数对高速列车行车安全性与乘坐舒适性影响的基础上，建立了较为完善的车线动力相互作用分析模型。
Based on the analyses of the effects of route alignment parameters on running safety and ride comfort, a model of dynamic interaction between vehicles and structures was established.
本实用新型公开了一种新型车用头管，头管侧壁至少设有 一个供线束穿设的导线孔。
The utility model discloses a novel vehicle-mounted head pipe, the sidewall of which is provided with at least one line guide hole for wiring harness to get through.
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