victorian industrial machinery, cone mill with vertical axis of rotation, 1870s, 19th century - 銑床 幅插畫檔、美工圖案、卡通及圖標
centrifugal sifting machine ,industrial machine used in flour milling, created by the german manufacturing firm nagel & kaemp - 銑床 幅插畫檔、美工圖案、卡通及圖標