References for the photos and pictures used:

Rheinbrücke Wesel: Oliver, Adobe Stock
Motorbremse: Jacobs Vehicle Systems
Reagenzgläser: Getty Images /Thinkstock
Siebmaschine: Andreas Hantschke
Lichtleiter, Glasfaser: Fernando Cortés, Adobe Stock
Muldenkipper Deisl-Beton, Tenneck/Salzburg: Florian Lorenz
Public Relations Grafik: Putilov Denis, Adobe Stock
Dartscheibe: Stockphoto, Adobe Stock
Feuerwehr Flughafen München: Allison Transmission/ Florian Lorenz
All other images: geldermannKommunikation