 |
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| 折射波 | |||
| 反射波 | |||
| 电离层反射波 | |||
| reflected wave: 30 phrases in 10 subjects |
| Air defense | 1 |
| Explosives and Explosive Ordnance Disposal | 2 |
| Geophysics | 3 |
| Information technology | 1 |
| Nautical | 1 |
| Oil / petroleum | 6 |
| Piezoelectric crystals | 1 |
| Space | 2 |
| Technology | 12 |
| Telecommunications | 1 |