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| |||
| recorded key | |||
| record key | |||
| recording key; write key | |||
| 记录键: 14 phrases in 7 subjects |
| Air defense | 1 |
| Cryptography | 3 |
| Electronics | 1 |
| Exhibitions | 1 |
| Information technology | 3 |
| Space | 1 |
| Technology | 4 |
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