Hand grip for canes

作者: Velton C. White

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参考文章(7)
Jane Mival, Handle for walking sticks ,(2004)
Jim R. Shultz, Cuong Bui, Adjustable hand grip for orthopedic crutch ,(1993)
John D. Camping, Vernon T. Bechel, David Pullman, Steven L. Donaldson, Custom fit carbon fiber composite forearm crutch ,(2001)
Joseph D. Bonanno, Illuminated umbrella handle ,(1991)