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| 便利用户功能 | |||
| 用户功能; 用户服务设施 | |||
| 用户便利 | |||
| 用户新功能; 用户设施 | |||
| 用户服务; 用户设备 | |||
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user facility : 6 phrases in 4 subjects |
| Computer networks | 1 |
| Earth sciences | 1 |
| Electronics | 3 |
| Telecommunications | 1 |
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