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| 多控磁控管; 谐振腔式磁控管; 空腔谐振磁控管 | |||
| 空腔磁控管 | |||
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cavity magnetron : 7 phrases in 4 subjects |
| Air defense | 1 |
| Shipbuilding | 2 |
| Technology | 2 |
| Telecommunications | 2 |
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