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Techniques
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Cutting Out Concave Shapes
Concave shapes, shapes that curve inwards on themesleves, are slightly
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Making Square Section Tubes
Square section tubes are quite common paper automata models. They
![extract](https://www.robives.com/wp-content/uploads/2016/06/gluing200.jpg)
![extract](https://www.robives.com/wp-content/uploads/2016/06/cut200.jpg)
Concave shapes, shapes that curve inwards on themesleves, are slightly
Square section tubes are quite common paper automata models. They