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| 呼叫线 | |||
| 呼叫电路; 业务线 | |||
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call circuit : 16 phrases in 6 subjects |
| Construction | 1 |
| Electronics | 6 |
| Information technology | 1 |
| Shipbuilding | 2 |
| Technology | 3 |
| Telecommunications | 3 |
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