Bildnachweis

Part of power plant control panel with switches and lamps – © KazantsevAlexander - fotolia.comPart of power plant control panel with switches and lamps
© KazantsevAlexander - fotolia.com
Messtechnik (Messen, Messmethode) – © fotodo - fotolia.comMesstechnik (Messen, Messmethode)
© fotodo - fotolia.com
Mischpult – © photocrew - fotolia.comMischpult
© photocrew - fotolia.com