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| 81. | telegraph speed |
| 电报速度 |
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| 82. | telegraph center |
| 电报中心 |
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| 83. | telegraph distributor |
| 电报分配器 |
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| 84. | express telegram |
| 长途电报 |
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| 85. | telegraph grade |
| 电报级 |
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| 86. | telegraph signal |
| 电报信号 |
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| 87. | telegraph magnifier |
| 电报扩大器 |
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| 88. | telegraphic equation |
| 电报方程 |
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| 89. | telegraph modulator |
| 电报调制器 |
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| 90. | NM (night message); NL (night letter); night telegram; night lettergram |
| 夜间电报 |
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