Bildnachweise

Allgemein:

Firmen-, Fertigungs- und Produktbilder © Zahnradfertigung OTT GmbH & Co. KG

Adobe Stock:

ID10557377 – Windenergie © Rebel
ID9029292 – Tagebau 4 © DianaH

iStockPhoto:

ID183430117 – Photograph of a fixed oil platform with a pair of support ships assisting in operations. © HeliRy

CanStockPhoto:

csp3622314 – Railroad lokomotive reist durch arizona © PaulMatthew