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| 应用等级 | |||
| 应用层; 应用级 | |||
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application level gateway : 22 phrases in 9 subjects |
| Bridge construction | 1 |
| Computer networks | 3 |
| Electronics | 6 |
| Information technology | 4 |
| Multimedia | 2 |
| Space | 2 |
| Technology | 1 |
| Telecommunications | 2 |
| United Nations | 1 |
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