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 Group Limited the Chinese and Congolese employees. China Railway Group Limited China Railway Group Limited known as CREC (the acronym of its predecessor and parent company China Railway Engineering Corporation) is a Chinese construction company which floats in Shanghai and Hong Kong stock exchanges. The major shareholder of the company is the state-owned China Railway Engineering Corporation (CRECG). By revenue, CREC is the largest construction company in the world in the 2015 "Engineering News-Record" "Top 225 Global Contractors". In 2016, CRECG ranks in the 57st place among "Fortune" Global 500 Enterprises and the 7th place among Top 500 Chinese Enterprises. CREC holds