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| 信号颜色 | |||
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signal color : 35 phrases in 10 subjects |
| Advertising | 1 |
| Air defense | 3 |
| Automobiles | 1 |
| Communications | 3 |
| Electronics | 7 |
| Rail transport | 2 |
| Shipbuilding | 1 |
| Space | 3 |
| Technology | 12 |
| Telecommunications | 2 |
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