Electric and electronic relays, classified by use

3774001 Relays, protection
3774002 Relays, safety
3774003 Relays, starting
3774006 Relays for distribution mains
3774007 Relays for signalling systems
3774008 Relays for measuring instruments
3774010 Relays, telegraph
3774011 Relays, telephone
3774015 Relays, speed monitoring
3774017 Relays, photoelectric, street lighting control
3774018 Relays, photoelectric, door opening
3774019 Relays, safety, for lifting equipment
3774028 Relays, aerospace industry
3774029 Relays, electric and electronic, military applications

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