3D펜 사용법
출처
https://docs.google.com/presentation/d/1Wth27BrlBrWk2rcpTLlc5wd-AnpCOCCcFW7pnJJBPUw/edit#slide=id.g7c30121082_1_39
https://www.youtube.com/watch?v=QPMAG35VvMs
https://22ww.tistory.com/17
출처
https://docs.google.com/presentation/d/1Wth27BrlBrWk2rcpTLlc5wd-AnpCOCCcFW7pnJJBPUw/edit#slide=id.g7c30121082_1_39
https://www.youtube.com/watch?v=QPMAG35VvMs
https://22ww.tistory.com/17