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change-over make before break contact
el.	Wechsler ohne Unterbrechung; Folgewechsler m; Ueberbrueckungskontakt m
change-over make-before-break contact
PSP	Wechsler ohne Unterbrechung; Folgewechsler m

change-over make before break contact: 3 phrases in 2 subjects

Electronics	1
Power system protection	2