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 Group Limited 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 a large share of the