Rail transit refers to the vehicle or transportation system in which operating vehicles need to run on specific tracks. With the acceleration of urbanization in China, rail transit has become the main way to transport population and cargo of China. Meanwhile, the China high-speed railway has become a beautiful national name card. In order to ensure the safety, reliability and maintainability of rail transit as well as the safe operation of rail transit system, GRG Test has developed the one-stop measurement and testing technical service capability for ...