Jisho

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むせんでんわ 無線電話
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Noun, Noun which may take the genitive case particle 'no'
1. cordless telephone; wireless telephone​
Wikipedia definition
2. Radiotelephone​A radiotelephone is a communications system for transmission of speech over radio. Radiotelephone systems are not necessarily interconnected with the public "land line" telephone network. "Radiotelephone" is often used to describe the usage of radio spectrum where it is important to distinguish the type of emission from, for example, radiotelegraph or video signals.
Read “Radiotelephone” on English Wikipedia
Read “無線電話” on Japanese Wikipedia
Read “Radiotelephone” on DBpedia

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