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| 光学记录; 光学记录法; 光记录 | |||
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optical recording : 40 phrases in 11 subjects |
| Data processing | 1 |
| Earth sciences | 1 |
| Electronics | 8 |
| Geology | 1 |
| Information technology | 2 |
| Missiles | 1 |
| Shipbuilding | 1 |
| Space | 4 |
| Sports | 1 |
| Technology | 17 |
| Telecommunications | 3 |
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