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| 放下的信号 | |||
| down signal: 12 phrases in 8 subjects |
| Air defense | 1 |
| Automobiles | 1 |
| Bridge card game | 1 |
| Communications | 2 |
| General | 1 |
| Space | 1 |
| Technology | 4 |
| Telecommunications | 1 |
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