Das solar tandem der Colle brüder

Are you curious about the #solarbike that the Colle Bothers are building? We are! Take a look at their profile here: https://t.co/ScUWZyoSeN#KUleuven pic.twitter.com/o4ZUwRc7Xd

— The Sun Trip (@TheSunTrip) 30 mai 2018

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