<p>2D도면작성 - 도면의 기본 규격<br></p><p><br></p><p><a href="https://www.youtube.com/watch?v=2WQHbXc3jN8&amp;feature" target="_blank">https://www.youtube.com/watch?v=2WQHbXc3jN8&amp;feature</a><br></p>