| |||
| 业务通信电路 | |||
| 公务电路; 业务电路; 勤务电路 | |||
|
service circuits : 63 phrases in 11 subjects |
| Aviation | 2 |
| Business | 6 |
| Electric machinery | 2 |
| Electronics | 25 |
| Information technology | 8 |
| Nautical | 1 |
| Oil / petroleum | 1 |
| Space | 2 |
| Technology | 2 |
| Telecommunications | 13 |
| Textile industry | 1 |