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安 全 报警 : 31 phrases in 9 subjects |
| Automobiles | 7 |
| Aviation | 1 |
| Chemistry | 1 |
| Electronics | 5 |
| Nautical | 1 |
| Oil / petroleum | 1 |
| Shipbuilding | 2 |
| Technology | 11 |
| Wind Energy | 2 |
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