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| 开关间隔 | |||
| 位元; 可单独存取的数据单元 | |||
| switch cell: 12 phrases in 6 subjects |
| Aviation | 1 |
| Computer networks | 1 |
| Electronics | 6 |
| General | 1 |
| Geophysics | 1 |
| Technology | 2 |
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