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| 通信线路; 电信线路 | |||
| 电信电路 | |||
| 远程通信线路 | |||
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| 电信线路包括明线，电缆，光缆等实线线路 | |||
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telecommunication line : 5 phrases in 3 subjects |
| Electronics | 1 |
| Information technology | 1 |
| Technology | 3 |
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