由西安科研所主持研制和路内外有关厂家共同设计制造的双线恒张力架线车是南昆线建设的中标项目,并于1999年6月在柳州铁路局百色供电段试验成功,通过了出厂验收。为了配合陇海线提速电气化改造工程,该车于2000年6月开始在陇海线咸宝段承 The double line constant tension overhead line co-developed by Xi’an Scientific Research Institute and co-designed and manufactured by relevant manufacturers both inside and outside the road is the winning project of the construction of Nan-Kun line. In June 1999, it was successfully tested in Baise Power Supply Section of Liuzhou Railway Bureau and passed the factory acceptance. In order to meet the Longhai line speed electrification project, the car in 2000 June began in the Longhai Xianbao paragraph bearing