油耗计算器，可以跟踪记录一辆车的油耗在时间上、空间上的变化，并进行分析，还可以提出建议。-Fuel consumption calculator, you can track a vehicle' s fuel consumption in terms of time, space changes, and analysis, but also to make recommendations.

动车所动车位置跟踪及定位系统 动车 所动车位置跟踪及定位系统-Vehicle location tracking and positioning system moved by EMU