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Signing UpStep 1: Materials
The materials:
1 big paperclip (I strongly recomend use colred ones they look nicer)
Tools:
1 permanent marker or sharpie
Long nose pliers
Something to make the paperclip round (i used a wide and broad marker)
















































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Fukushima Technology Center in Kohriyama-City in Japan came up with this top.
I wrote mt thesis on them:
http://people.ucsc.edu/~jfrieder/Thesis.pdf
It even has a video, history, and a diagram.