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1 问题的提出 四方机车车辆厂生产的东风5型机车在我段作为站内调机或小运转机车使用，根据我段东风5型机车乘务员反映的情况和我们在机车作业过程中了解的实际情况，我们觉得机车上的司机室内照明灯电路的设计不够完美。东风5型机车的司机室照明灯有两只，一只照明灯（记?
1 PROBLEM PROBLEMS Dongfeng 5 locomotives produced by Sifang Locomotive and Rolling Stock Works are used in our station as locomotive transfer or small locomotives. According to the situation reflected by the flight attendant of DF_5 locomotive and the actual situation of our locomotive operation, We think the design of the driver’s interior lighting circuit on the locomotive is not perfect. Dongfeng 5 locomotive driver’s cab with two lights, a light (remember?