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| defense against gas | |||
| anti-gas; gas-proof (的) | |||
| gas defense | |||
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防毒气 : 25 phrases in 10 subjects |
| Architecture | 2 |
| Drilling | 1 |
| Exhibitions | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| General | 4 |
| Oil processing plants | 1 |
| Packaging | 2 |
| Space | 4 |
| Technology | 5 |
| Textile industry | 4 |
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