| 单词 | permanent-magnet focusing |
| 释义 | permanent-magnet focusing [`pǝr·mǝ·nǝnt ¦mag·nǝt `fō·kǝs·iŋ] ELECTRONICS Focusing of the electron beam in a television picture tube by means of the magnetic field produced by one or more permanent magnets mounted around the neck of the tube. |
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