Rotary polishing device having means to illuminate the work
作者： Myron C Arf
DOI:
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摘要:
lens.org 参考文章(5)
Johnson Moses, Illuminated hand held motor tool ,(1947)
Bustos Jorge, Shoe cleaning machine ,(1927)
Reinhold F H Mueller, Device for cleaning and polishing dental plates, etc. ,(1937)
Wade E Scott, Rotary tooth brush ,(1938)
Sr Randolph Anderson, Shoe-shining machine ,(1924)