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installation d'intercommunication
gen.	intercommunication system; interphone; talk-back circuit; two-way loud speaker
commun.	intercom system; intercommunicating system
tel.	internal telephone system; house telephone system
telecom.	key telephone system; key system; press-to-talk system; two-way telephone system

installation d'intercommunication: 7 phrases in 1 subject

Communications

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