High-speed rail 'ambulance' makes debut in SW China(1/4)

This photo taken on December 23, 2014 shows China's first overhead line service vehicle (OLSV) put on trial at a special maintenance centre in Chengdu in southwest China's Sichuan province. With a maximum speed of up to 160km/h, this multifunctional vehicle will be used to perform maintenance work in the high-speed rail network. At least 400 overhead line service vehicles are needed to service China's sprawling railway network. [Photo: scol.com.cn]