Elektrische Werkleuchte fuer Naehmaschinen
作者： Abravanel Edgar
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摘要:
lens.org 参考文章(4)
Wilfred O Langille, Sewing machine lighting fixture ,(1937)
Singer Mor Josif, Draaisma Gijsbertus Hendricus, Lighting device for sewing machines ,(1947)
Charles H. W. Doubler, Illuminating device for sewing machines or the like ,(1933)
Heimann Willi, Leuchte fuer Naehmaschinen ,(1952)