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Chemical Defence
| Experimental Establishment
| chemical defence | |
| gen. | 防化学的 |
| experimental establishment | |
| auto. | 实验部门 |
| avia. | 实验设施 |
| earth.sc. | 实验安排; 试验中心 |
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| 防化学的 | |||
| Chemical Defence: 10 phrases in 3 subjects |
| Aviation | 2 |
| General | 6 |
| Space | 2 |
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