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「水遊び」 一覧
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「浮き輪に効率的に空気を入れる方法」で紹介した、ハイアウトプットハンドポンプですが、あまりに空気を入れる能力が高いので、油断すると浮き輪が破裂します。 そもそも浮き輪は何気圧まで耐えられるのか、浮き輪 ...
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30年前は、浮き輪を息や、足踏みポンプでふくらましたりしていましたが、今はむりです。 ということで、シガーソケットから電源を得るタイプの電動空気入れ（電動エアーコンプレッサー）を使用していました。 空 ...
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