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| 继电器座框，架 | |||
| 继电器座子 | |||
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relay frame : 60 phrases in 8 subjects |
| Air defense | 1 |
| Communications | 1 |
| Computer networks | 7 |
| Electronics | 33 |
| Information technology | 11 |
| Multimedia | 1 |
| Space | 3 |
| Telecommunications | 3 |
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