It was a machine mounted on two wheels, that had a seed box in the bottom of which was a series of holes opening into a corresponding number of metal tubes or funnels. 威廉·亨利·杜利特.世纪发明.
And as to tube and metal bending, there are wonderful machines which bend sheets of metal into great tubes, funnels, ship masts and cylinders. 威廉·亨利·杜利特.世纪发明.
These converging horns or funnels, with a large speaking-trumpet in between them, are mounted on a tripod, and the megaphone is complete. 弗兰克·刘易斯·戴尔.爱迪生的生平和发明.
The _Megaphone_ of Edison appeared, consisting of two large funnels having elastic conducting tubes from their apices to the aural orifice. 威廉·亨利·杜利特.世纪发明.