<iframe width="1280" height="720" src="https://www.youtube.com/embed/HaykRsjWI68" title="연필심을 대량생산하는 과정. 일본 유일의 연필심 제조공장" 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="연간 5억개의 연필이 생산되는데, 중국 공장에서 색연필은 어떻게 만들어질까?" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>