(noun.) telephone central where circuits are completed with patchcords.
整理:贾丝廷
双语例句
The copper wires connecting the instruments to the switchboard were small, crystallized, and rotten. 弗兰克·刘易斯·戴尔.爱迪生的生平和发明.
The switchboard for manipulating the wires was about thirty-four inches square. 弗兰克·刘易斯·戴尔.爱迪生的生平和发明.
This has been accomplished through the invention of the multiple switchboard and a great number of inventions and improvements in all the apparatus used in the transmission of speech. 佚名.神奇的知识之书.
Then he proceeded to pull the switchboard away from the wall. 弗兰克·刘易斯·戴尔.爱迪生的生平和发明.
In each one is introduced a pyrometer, connected electrically with a switchboard located in a separate building. 佚名.神奇的知识之书.
This switchboard is very similar to those used in telephone exchanges. 佚名.神奇的知识之书.
Nor was there a central switchboard! 弗兰克·刘易斯·戴尔.爱迪生的生平和发明.
For this purpose, see Fig. 63, a continuous switchboard is arranged along the side of a large room and occupies most of that side of the wall. Edward W. Byrn.十九世纪发明进展.
In addition, stock tickers, telephones, telephone switchboards, and typewriters were made the Hammond typewriters were perfected and made there. 弗兰克·刘易斯·戴尔.爱迪生的生平和发明.