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Which telecommunications device is widely used in industries that require closed communication?

A. fixed-line telephones

B. mobile phones.

C. satphones

D. walkie-talkies

E. small phones

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Answers (1)
  1. 20 October, 19:30
    0
    D. walkie-talkies

    Explanation:

    walkie-talkies are used in industries that require closed communication
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