Coiled pipe bender - GIF

Coiled pipe bender .

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Previously:

https://www.homemadetools.net/forum/...983#post226749
https://www.homemadetools.net/forum/...tion-gif-94890
https://www.homemadetools.net/forum/...713#post223401
https://www.homemadetools.net/forum/...ubes-gif-89794

Looks like a coaxial heat exchanger. There is a small tube inside the larger one.