To set up mileage model is very important for computer application in railway passenger and freight transport.

建立里程模型对铁路客货运输应用计算机非常重要。

youdao

To set up mileage model is very important for computer application in railway passenger and freight transport.

建立里程模型对铁路客货运输应用计算机非常重要。

youdao