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The Historyscoper's Science and Technology Watch Blog Apr. 2, 2015

Thursday, January 31, 2013

Ever Wonder How They Make Snowboarding Half-Pipes?


http://www.ohgizmo.com/2013/01/31/ever-wonder-how-the-make-snowboarding-half-pipes/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+Ohgizmo+%28OhGizmo!%29
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