quadruplex telegraph造句

例句与造句

However his most famous work was defending Edison s quadruplex telegraph and incandescent light bulb patents.
Including the quadruplex telegraph, the carbon microphone, phonograph, incandescent light bulb and system of electric lighting.
In an article written by Andrew Hargadon, he states, " Between the years of 1876 to 1881, the lab ( Menlo park ) produced numerous innovations in high speed, automatic and repeating, telegraphs; telephones; phonographs; generators, voltmeters; light bulbs; and vacuum pumps . " Edison s first major financial success was the quadruplex telegraph.
To send two signals in a single direction at the same time, the quadruplex telegraph used one signal to vary the absolute strength or voltage of the signal ( amplitude modulation ) and the other signal to vary the phase ( polarity ) of the line ( phase modulation ), i . e ., the direction of current flow imposed upon the wire.
It's difficult to find quadruplex telegraph in a sentence. 用quadruplex telegraph造句挺难的