13.机车信号设备分为哪几类？分别用在什么区段？
["\u7b54\uff1a\u673a\u8f66\u4fe1\u53f7\u5206\u4e3a\u8fde\u7eed\u5f0f\u548c\u63a5\u8fd1\u8fde\u7eed\u5f0f\u3002\u81ea\u52a8\u95ed\u585e\u533a\u6bb5\u5e94\u88c5\u8bbe\u8fde\u7eed\u5f0f\u673a\u8f66\u4fe1\u53f7\uff0c\u534a\u81ea\u52a8\u95ed\u585e\u548c\u81ea\u52a8\u7ad9\u95f4\u95ed\u585e\u533a\u6bb5\u5e94\u88c5\u8bbe\u63a5\u8fd1\u8fde\u7eed\u5f0f\u673a\u8f66\u4fe1\u53f7\u3002"]