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| MAC server data unit | |||
| service data unit | |||
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服务数据单元 : 24 phrases in 7 subjects |
| Artificial intelligence | 1 |
| Electronics | 5 |
| Information technology | 5 |
| Multimedia | 1 |
| Space | 4 |
| Technology | 1 |
| Telecommunications | 7 |
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