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внутреннее переговорное устройство stresses
Apollo-Soyuz	speaker-box
astronaut.	internal communications system; speaker box; internal communications device
dril.	intercommunication
mil.	intercommunication set; intercommunication system
mil., inf.	squawk box
telecom.	talk-back circuit

внутреннее переговорное устройство: 2 phrases in 2 subjects

Astronautics	1
Telecommunications	1