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| high frequency tube | |||
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高频管 : 46 phrases in 8 subjects |
| Air defense | 7 |
| Aviation | 1 |
| Construction | 1 |
| Electronics | 1 |
| Metallurgy | 11 |
| Oil / petroleum | 1 |
| Shipbuilding | 2 |
| Technology | 22 |
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