Nine tech developments spotted at F1 testing

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The opening Formula 1 pre-season test gave us a first proper look at all of the cars, and the chance to see many of the parts the teams were either hiding or didn’t have ready at their launches. Jake Boxall-Legge and Gary Anderson take you through the most interesting parts they discovered in the Barcelona pit lane last week, with the help of illustrations from the great technical eye of Giorgio Piola