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push-to-talk switch /ˈpʊʃtətˈɔːk ˈswɪtʃ/ n

中文：通话按钮

中文 · 通话按钮Español · interruptor de emisiónFrançais · interrupteur d’émission
Meaning：When this button is pressed, voice messages can be sent from one CB unit to another; when it is released, messages can be received.
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Found in these illustrated scenes（2）

CB radio Walkie-talkie

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