Designating apparatus and facilities for two-way communication by loudspeaker, usually between one who gives and one who receives instructions; spec.…
| 单词 | θ198163 |
| 释义 | society > communication > telecommunication > intercom > [adjective] > talk-back system (1) talk-back1933 Designating apparatus and facilities for two-way communication by loudspeaker, usually between one who gives and one who receives instructions; spec.… |
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