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カーボンマイクロフォン

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A warm, simple introduction to the telephone for kids. Learn how Bell's curiosity led to the first call, meet other inventors, and try a playful paper-cup activity to show how sound travels. STEAM

子供のための電話の歴史：音と発明の小さな驚異

子供のための電話の暖かくシンプルな紹介。…

Roshni Sawhny

Roshni Sawhny

5月 20, 2026 •
1 分で読める

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