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| 特征波 | |||
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characteristic wave : 18 phrases in 7 subjects |
| Electric machinery | 1 |
| Electronics | 3 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Oil / petroleum | 3 |
| Shipbuilding | 2 |
| Technology | 7 |
| Telecommunications | 1 |
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