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鉛筆が完璧な理由
1,527,712 views |
キャロライン・ウィーバー |
Small Thing Big Idea
• March 2018
Read transcript
鉛筆が六角形で黄色が定番になったのはどうして？ 鉛筆店を営むキャロライン・ウィーバーが、鉛筆の心躍るような歴史へと誘います。
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