In a system of electric bells: a device by which the operator resets an indicator after it has dropped or closed to show which bell has rung. Obsolete…
| 单词 | θ77544 |
| 释义 | the world > matter > physics > electromagnetic radiation > electricity > electrical appliances or devices > [noun] > drop annunciator (1) throwback1889 In a system of electric bells: a device by which the operator resets an indicator after it has dropped or closed to show which bell has rung. Obsolete… |
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英语词典包含1132095条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。