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| 41. | duplex telegraphy |
| 双工电报 |
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| 42. | continuous wave telegraphy |
| 等幅波电报|连续波电报 |
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| 43. | The message reads in full as follows. |
| 电报全文如下。 |
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| 44. | telegraph bandwidth |
| 电报带宽 |
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| 45. | inland telegraph |
| 国内电报 |
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| 46. | by telegram |
| 用电报 |
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| 47. | A telegraph service. |
| 电报服务 |
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| 48. | transmit a telegram |
| 发送电报 |
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| 49. | get a telegram |
| 收到电报 |
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| 50. | telegraph cable |
| 电报电缆 |
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