How to draw development of a pipe?

In this video, We are doing development of a pipe 2015 TDA Background music is taken from www.free-stock-music.com No. 3 by The Denotes | https://thedenotes.bandcamp.com Music promoted by https://www.free-stock-music.com Creative Commons Attribution-ShareAlike 3.0 Unported https://creativecommons.org/licenses/... #Technicaldrawing #Engineeringdrawing.