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| 扩充部件; 附加单元 | |||
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extension unit : 14 phrases in 8 subjects |
| Bridge construction | 1 |
| Electronics | 7 |
| Hydroelectric power stations | 1 |
| Information technology | 1 |
| Multimedia | 1 |
| Name of organization | 1 |
| Space | 1 |
| Technology | 1 |
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