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| 调幅广播的地波 | |||
| 地表波 | |||
| 地面电波 | |||
| ±也波 | |||
| 地震波 | |||
| 地波 | |||
| 地波; 地面波; 地面波 | |||
| 直接辐射波; 地面电声波; 地面电光波; 地面电波; 地层波 | |||
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| 地面电波; 地波 | |||
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ground wave : 26 phrases in 8 subjects |
| Air defense | 6 |
| Aviation | 2 |
| Electronics | 1 |
| Information technology | 2 |
| Metallurgy | 1 |
| Oil / petroleum | 1 |
| Space | 6 |
| Technology | 7 |
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