JT-C系列机车信号显示需要变化时,怎样实现继电器接点的无电转换?
["\uff081\uff09 \u914d\u7ebf\u6574\u9f50\uff0c\u82af\u7ebf\u5e94\u9884\u7559\u67095mm\u4ee5\u4e0a\u4f59\u91cf\uff0c\u9632\u6b62\u8fc7\u7d27\u6298\u65ad\uff1b\uff082\uff09\u7535\u7f06\u6309\u8981\u6c42\u56fa\u5b9a\uff0c\u6bcf\u4e2a\u5c3c\u9f99\u7d27\u56fa\u5361\u95f4\u8ddd\u572820\uff5e30cm\u95f4\uff1b\uff083\uff09\u7535\u7f06\u8d70\u5411\u5e73\u76f4\uff0c\u4e0e\u5176\u4ed6\u7535\u7f06\u4e0d\u4ea4\u53c9\uff0c\u5f15\u5165\u53e3\u6709\u9632\u78e8\u5361\u63aa\u65bd\uff1b\uff084\uff09\u5c4f\u853d\u7ebf\u5f15\u5230\u673a\u8f66\u4e0a\uff0c\u8981\u96c6\u4e2d\u5355\u7aef\u63a5\u5730\u3002"]