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| 系统防护层; 系统密闭度 | |||
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system containment : 51 phrases in 10 subjects |
| Aviation | 2 |
| Earth sciences | 1 |
| Ecology | 1 |
| Electronics | 31 |
| General | 1 |
| Mechanic engineering | 1 |
| Metallurgy | 2 |
| Nautical | 1 |
| Nuclear and fusion power | 9 |
| Technology | 2 |
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