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maritime communications /ˈmaɹɪtˌaɪm kəmjˌuːnɪkˈeɪʃənz/ n

中文：航海通信

中文 · 航海通信Español · comunicaciones marítimasFrançais · communications maritimes
Meaning：All the messages used to help ships and submarines navigate and to control maritime traffic.
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Satellite communication

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