SNCF BB 13000 SNCF BB 13000 The BB 13000 class were electric locomotives operated by SNCF in France. They were one of four classes, together with the BB 12000, CC 14000 and CC 14100 classes, that formed an experimental group for studying the practicality of the new French electrification. The standard French electrification system before WWII was 1,500 V DC, beginning with locomotives such as the 2BB2 400. Post-WWII, France occupied the south-west of Germany and the . This line had been electrified with one of the first systems to use 50 Hz, the standard commercial distribution frequency, rather than the lower Hz
China Railway No.2 Group China Railway No.2 Group China Railway No.2 Group Co., Ltd. and China Railway Erju Engineering Co., Ltd. were two closely connected companies. They are formerly parent-subsidiary via China Railway Erju Co., Ltd. (CREC). The group is a Chinese construction company based in Chengdu. China Railway Erju is formerly listed on the Shanghai Stock Exchange; In turn, Erju (literally means the second bureau [of the former Ministry of Railways]) is an indirect subsidiary of China Railway Group Limited (also abb. CREC, successor of China Railway Engineering Corporation), which in turn indirectly supervised by the State-owned Assets Supervision and Administration Commission of