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| closed region | |||
| closed domain | |||
| close region; closure domain | |||
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| closed region | |||
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闭 域 : 43 phrases in 13 subjects |
| Cryptography | 1 |
| Desert science | 2 |
| Ecology | 1 |
| Electronics | 2 |
| General | 1 |
| Hydroelectric power stations | 1 |
| Metallurgy | 1 |
| Nautical | 1 |
| Oil / petroleum | 5 |
| Space | 1 |
| Technology | 24 |
| United Nations | 2 |
| Water resources | 1 |
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