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增强型业务 | |||
增强性业务 | |||
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增强型业务 | |||
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增强型业务原称为 value-added network, value-added service, 与 basic service 相对 |
enhanced service : 13 phrases in 7 subjects |
Air defense | 1 |
Aviation | 1 |
Computer networks | 1 |
Electronics | 4 |
Information technology | 3 |
Space | 2 |
Telecommunications | 1 |