<iframe width="1280" height="720" src="https://www.youtube.com/embed/HaykRsjWI68" title="鉛筆心を大量生産する過程. 日本唯一の鉛筆心製造工場" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>

<iframe width="1280" height="720" src="https://www.youtube.com/embed/e0D54zPzRtk" title="How Pencils Are Made | Made Here | Popular Mechanics" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>

<iframe width="1280" height="720" src="https://www.youtube.com/embed/LBmvay5_x0E" title="年間 5億個の鉛筆が生産されるのに, 中国工場で色鉛筆はどうにさせられようか?" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>