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manual switchboard造句

"manual switchboard"是什么意思   

例句與造句

  1. The Avalon telephone directory in 1920 listed 52 subscribers serviced by a manual switchboard.
  2. Strangely, it was decided to continue with manual switchboards.
  3. The telephone system is still operated by its original old manual switchboard, which was manufactured by Siemens.
  4. He owns the Riverview Hotel, where Bailey's Camden Telephone Co . started business with a manual switchboard.
  5. The terms originate in reference to the telephone plugs used for connecting telephone calls in manual switchboards.
  6. It's difficult to find manual switchboard in a sentence. 用manual switchboard造句挺難的
  7. By 1904 over three million phones in the U . S . were connected by manual switchboard exchanges.
  8. An early form called quaternary pulses to set up calls between a panel switch and a manual switchboard.
  9. Instead, they took the highly unusual step of adding a dial and trunk lines to every manual switchboard position.
  10. Established by his family in 1927, Camden Telephone began as a manual switchboard and grew to be Camden County's primary carrier.
  11. The electromechanical automatic telephone exchange, invented by Almon Strowger in 1888, gradually replaced manual switchboards in central telephone exchanges around the world.
  12. A small mom and pop company might have had the husband doing the outside lines work and the wife operating a manual switchboard.
  13. The museum also contains the analogue telephone exchanges ( one of them a mobile TXE2 ), a manual switchboard and early automatic systems.
  14. Catalina's isolation also left the island as the last central office in the US Bell System to operate entirely using manual switchboard operators.
  15. Collarenebri was among the last places in Australia to be converted from a manual switchboard to an automatic telephone exchange ( in 1986 ).
  16. In areas with mostly machine switches and a few manual switchboards, Panel Call Indicator ( PCI ) signaling lit lamps on the B operator's desk at the terminating manual office.
  17. 更多例句:  下一頁

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