| 单词 | hanger-board |
| 释义 | > as lemmashanger-board hanger-board n. (see quot. 1893 at sense 5c). ΘΚΠ the world > matter > physics > electromagnetic radiation > electricity > electric light > [noun] > board for arc-lamp hanger-board18.. 18.. Electr. Rev. (U.S.) XII. 8 (Cent. Dict.) Electrical connection between the conducting-wires and lamps must be made through a suitable hanger-board. 1892 T. O'C. Sloane Standard Electr. Dict. (1893) 284 Hanger board, a board containing two terminals, a suspending hook, and a switch, so that an arc lamp can be introduced into a circuit thereby, or can be removed as desired. < as lemmas |
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