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Nitinol Memory Wire
描述
http://www.teachersource.com/product/nitinol-memory-wire-by-the-foot/energy Nitinol Memory Wire is a crystalline metal that changes phase around 50oC.Wind it around a pencil to form a coil. When immersed in hot water, the wire returns to its original shape. Bend it, then drop it into hot water and it
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