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intercommunication system; interphone; talk-back circuit; two-way loud speaker | |||
transmitter-receiver | |||
transceiver |
transmisor- receptor: 37 phrases in 8 subjects |
Armored vehicles | 1 |
Communications | 16 |
Electronics | 1 |
Information technology | 8 |
Patents | 2 |
Technology | 5 |
Transport | 3 |
United Nations | 1 |