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| 脉冲取样 | |||
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pulse sampling : 19 phrases in 8 subjects |
| Air defense | 1 |
| Aviation | 1 |
| Cartography | 1 |
| Electronics | 1 |
| Information technology | 1 |
| Oil / petroleum | 2 |
| Space | 3 |
| Technology | 9 |
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