A board or frame bearing a set of switches for connecting and disconnecting the various circuits of an electrical system, as of a telegraph…
单词 | θ198144 |
释义 | society > communication > telecommunication > telegraphy or telephony > [noun] > switchboard (2) switchboard1873 A board or frame bearing a set of switches for connecting and disconnecting the various circuits of an electrical system, as of a telegraph… switch-tablea1884 a form of switchboard shaped like an ordinary table. |
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