Assertion: relay's switch | /r/HasProperty | simple one-way - on/off -
Facets:
Source sentences:
text: Some relays are simple one-way - on/off - switches.
text: Relays are simple switches which are operated both electrically and mechanically.
text: ­­A relay is a simple electromechanical switch made up of an electromagnet and a set of contacts.
text: Some relays are simple one-way - on/off - switches.