1960년대 볼펜 제조비밀을 100% 가르쳐주지 않은 일본
<iframe width="1840" height="1035" src="https://www.youtube.com/embed/fKwafNfj_AM" title="80년대 모나미 153 볼펜과 자매품 생산공장 (마음이 편안해지는 생산과정)" 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="1840" height="1035" src="https://www.youtube.com/embed/rj6oOS2q8X8" title="모나미153 볼펜은 어떻게 대중화됐을까?" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>