The diaphragms in all the chambers are so connected that they move in concert. 佚名.神奇的知识之书.
By means of slide valves, like those of a steam engine, worked by the movement of the diaphragms, the gas to be measured passes alternately in and out of each space. 佚名.神奇的知识之书.
The diaphragms used in the recorders and reproducers are made of French rolled plate glass, thinner than a sheet of ordinary writing paper. Edward W. Byrn.十九世纪发明进展.
There were two diaphragms, one on each side of the cylinder, one being for recording and the other for reproducing speech or other sounds. 弗兰克·刘易斯·戴尔.爱迪生的生平和发明.