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| digital format | |||
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| digital betacam | |||
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数 字 betacam 格式 : 20 phrases in 7 subjects |
| Aviation | 1 |
| Electronics | 9 |
| General | 1 |
| Information technology | 2 |
| Librarianship | 1 |
| Multimedia | 3 |
| Technology | 3 |
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