At present, the train signal systems include the fixed block system and the moving block system.

目前列车信号控制系统中有固定闭塞系统和移动闭塞系统。

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At present, the train signal systems include the fixed block system and the moving block system.

目前列车信号控制系统中有固定闭塞系统和移动闭塞系统。

youdao