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| 脉冲电子管 | |||
| 脉冲管 | |||
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| 脉冲管 | |||
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pulse tube : 19 phrases in 7 subjects |
| Air defense | 5 |
| Animal husbandry | 1 |
| Chemistry | 1 |
| Metallurgy | 2 |
| Radio | 1 |
| Refrigeration | 2 |
| Technology | 7 |
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