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| attendant's switchboard; manual desk | |||
| manual switchboard | |||
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人工 交换 台 : 3 phrases in 1 subject |
| Technology | 3 |
The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">Add | The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">Report an error
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