近几年来，由于改革的压力，市场经济的挑战，铁路的计划经济份额将逐步减少。以往电务段的效益主要来源于上级部门计划拨下的工程，今后工程任务可能逐年减少。要取得良好的效益，除了主业（通信、信号为运输服务）以外，必须寻找新的经济增长点。南京电务段的实践证明，电务? In recent years, due to the pressure of reform and the challenge of market economy, the planned economic share of the railways will gradually decrease. In the past, the benefits of the electricity sector mainly came from the projects planned by higher authorities, and the tasks of engineering may be reduced year by year in the future. To achieve good results, we must find new points of economic growth other than the main business (communications and signals as transportation services). Nanjing electricity section of the practice proved that electricity?