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junction exchange | |||
tandem office | |||
Junction Office | |||
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trunk exchange |
中继局 : 46 phrases in 9 subjects |
Aviation | 1 |
Communications | 2 |
Electronics | 20 |
General | 1 |
Information technology | 6 |
Rail transport | 1 |
Space | 1 |
Technology | 4 |
Telecommunications | 10 |