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Posted to rec.crafts.metalworking
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Springy steel
David Lesher wrote:
It would be made from spring steel, say coat-hanger diameter, in s
specific shape. Key to its use would be it could be bent in one way to
deploy it, but it would revert to its original shape.
http://en.wikipedia.org/wiki/Shape_memory_alloy
HTH,
Wes
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