SNCF Class BB 10003 locomotive was used as a test machine for operations of the TGV-TMST on 750 V and 3000 V. In 1998 the locomotive was converted back to a non-experimental class - as SNCF BB 15007. (SNCF Class BB 15000) The results were not as good as synchronous motor technology; it was not until the introduction of GTO transistor technology that series production of an asynchronous induction motored locomotive began in France, as the "Eurostar" TGV (1992), and later the BB 36000 "Astride" (1996). SNCF Class BB 10003 The locomotive SNCF BB 10003 was an experimental prototype locomotive converted from a SNCF
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