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| 反射波 | |||
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reflection wave : 29 phrases in 11 subjects |
| Air defense | 2 |
| Aviation | 1 |
| Electronics | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Geophysics | 1 |
| Hydroelectric power stations | 1 |
| Metallurgy | 1 |
| Rail transport | 1 |
| Shipbuilding | 1 |
| Space | 3 |
| Technology | 16 |
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