Switchboard

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.

手打:马吉