Switchboard

来自Big Physics
Safin（讨论 | 贡献）2022年4月28日 (四) 04:56的版本 （建立内容为“Category:etymology == wiktionary == [https://en.wiktionary.org/wiki/switchboard ref] switch +‎ board == etymonline == [https://www.etymonline.com/word/…”的新页面）
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wiktionary

ref 

switch +‎  board


etymonline

ref

switchboard (n.)

also switch-board, "device for making interchangeable connections between many circuits," 1867, from switch (n.) + board (n.1).

取自“https://www.bigphysics.org/index.php?title=Switchboard&oldid=37872”