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| alternate mark inversion | |||
| alternate digit inversion | |||
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| alternate mark inversion code | |||
| 传号交替反转: 17 phrases in 6 subjects |
| Automobiles | 1 |
| Computer networks | 1 |
| Electronics | 4 |
| Information technology | 3 |
| Technology | 1 |
| Telecommunications | 7 |
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