[大人の科学]真空管アンプを作ってみた
1:41
Added: 4 years ago
From: gizmodojapan
Views: 20,165
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  • これ、1万円以上するんだよね。

    tou1123456789023 1 year ago

  • ぜひ音が聞きたいです

    mrktkn 2 years ago

  • ずっと立って疲れませんか？

    yutakiti238 3 years ago

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