`  == Are Relais solid state? ==  This article gives no clarification, but I think, it should. Especially as the disambguation side explicitly declares that a solid-state device does not contain relays. Which I suspect to be wrong. There exist many devices that are called  solid-state an do in fact contain relais.   Another Question arises about the definition ``moving parts``: There are devices that contain keys and switches and potentiometers, all of them sporting moving (or movable) parts and the devices are regarded solid-state nevertheless.   `