【Bizmates レベル5 解説】今日はLED発明の話!The Final Ingredient! https://koputokiryo.com/%e3%80%902021%e5%b9%b42%e6%9c%8824%e6%97%a5%e3%80%91bizmates%e8%8b%b1%e4%bc%9a%e8%a9%b1%e3%80%81%e4%bb%8a%e6%97%a5%e3%81%afled%e7%99%ba%e6%98%8e%e3%81%ae%e8%a9%b1%ef%bc%81/