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中继线群
| 占线
| 中继线群 | |
| telecom. | trunk group |
| 占线 | |
| oil | busy |
| telecom. | line busy; engage; engaged; in active; line in use; line seizure |
| telecom. amer. | line-busy |
| |||
| trunk group | |||
|
中继线群 : 22 phrases in 3 subjects |
| Electronics | 11 |
| Technology | 2 |
| Telecommunications | 9 |
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