无产阶级文化大革命推动了铁路运输生产的发展,内燃机车普遍运用,列车速度逐步提高,这对铁路信号显示距离提出了新的要求。信号是铁路行车的“眼睛”,“眼睛”看不清,速度提不高,安全无保障。上海铁路分局上海电务段职工怀着当家作主的责任感,想运输生产所想,急运输生产所急,提出:“内燃机车上去了,我们怎 The Great Proletarian Cultural Revolution promoted the development of railway transport production. The widespread use of diesel locomotives and the gradual increase of train speed put forward new requirements on the railway signal display distance. The signal is the “eye” of railway traffic, the “eyes” can not be seen, the speed is not high, and the security is not guaranteed. Shanghai Railway Branch Shanghai Electrician workers with the responsibility of being the masters of their own home, want to transport production want, urgent transport production urgently proposed: "The diesel locomotive up, how do we