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化学生产 : 25 phrases in 12 subjects |
| Business | 3 |
| Ceramics | 1 |
| China | 1 |
| Ecology | 1 |
| Electronics | 1 |
| Explosives and Explosive Ordnance Disposal | 4 |
| General | 1 |
| Horticulture | 1 |
| Metallurgy | 3 |
| Technology | 3 |
| Textile industry | 4 |
| United Nations | 2 |
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