週1回の基礎技術の確認 https://energy.jp/blog/2019/02/14/%e9%80%b1%ef%bc%91%e5%9b%9e%e3%81%ae%e5%9f%ba%e7%a4%8e%e6%8a%80%e8%a1%93%e3%81%ae%e7%a2%ba%e8%aa%8d/