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Gegensprechanlage f =, -n
gen.	intercom; intercom system; intercommunication system; interphone; talk-back circuit; two-way intercom; talkback; two-way loud speaker
busin., IT	duplex telephone system
chem.	two-way radio
commun., chem.	duplex system; two-way communication system
construct.	entry phone; interphone system
med.appl.	talk-back loudspeaker
tech.	two-way loudspeaker system
telecom.	two-way intercom system
Gegensprechanlagen f
gen.	intercoms

Gegensprechanlage: 3 phrases in 2 subjects

Information technology	1
Transport	2