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  <author_name>ktonegaw</author_name>
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  <blog_title>とね日記</blog_title>
  <blog_url>https://ktonegaw.hatenadiary.org/</blog_url>
  <categories>
    <anon>iPhone、携帯、電卓</anon>
  </categories>
  <description>1970年代、関数電卓はものすごい勢いで進化していた。</description>
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  <provider_name>Hatena Blog</provider_name>
  <provider_url>https://hatena.blog</provider_url>
  <published>2013-08-02 16:54:40</published>
  <title>70年代の関数電卓：CASIO fx-10 (1974)、fx-15 (1975)、fx-19 (1976)</title>
  <type>rich</type>
  <url>https://ktonegaw.hatenadiary.org/entry/2013/08/02/165440</url>
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