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| carrier wave telegraphy | |||
| carrier telegraph | |||
| carrier telegraphy | |||
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载波电报 : 12 phrases in 8 subjects |
| Air defense | 1 |
| Business | 1 |
| Communications | 1 |
| Electronics | 1 |
| Information technology | 3 |
| Shipbuilding | 2 |
| Technology | 2 |
| Telecommunications | 1 |
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