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| hermetically sealed enclosure | |||
| 封密外壳: 23 phrases in 8 subjects |
| Architecture | 1 |
| Automobiles | 3 |
| Electric machinery | 1 |
| Electronics | 7 |
| General | 2 |
| Nautical | 1 |
| Plastics | 1 |
| Technology | 7 |
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