multiple switchboard
Telephony (now historical )
noun
A manual switchboard in which each subscriber's circuit is repeated so as to make it accessible to each operator.
Origin
Late 19th century.
| 单词 | multiple switchboard |
| 释义 | multiple switchboardTelephony (now historical ) noun A manual switchboard in which each subscriber's circuit is repeated so as to make it accessible to each operator. Origin |
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