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| dial private branch exchange; private automatic exchange | |||
| automatic branch exchange | |||
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自动小交换机 : 16 phrases in 9 subjects |
| Electronics | 6 |
| Hydroelectric power stations | 2 |
| Information technology | 1 |
| Multimedia | 1 |
| Nuclear and fusion power | 1 |
| Rail transport | 1 |
| Technology | 1 |
| Telecommunications | 2 |
| United Nations | 1 |
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