国外厂商对列车网络及控制技术进行了垄断，相应的设备也己经开发成熟。

Foreign Manufacturers monopolize the TCN products and control technique and the relevant devices are quite mature.

youdao

国外厂商对列车网络及控制技术进行了垄断，相应的设备也己经开发成熟。

Foreign Manufacturers monopolize the TCN products and control technique and the relevant devices are quite mature.

youdao