Legrest support for wheel chairs
作者： Fenton F Sully
DOI:
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摘要:
lens.org 参考文章(3)
Herbert A Everest, Harry C Jennings, Adjustable leg rest for wheel chairs ,(1950)
Ross B Woody, Adjustable bedside stand and tray ,(1946)
Charles H Nichols, Adjustable lamp-support. ,(1911)