operator services
| position system
| operator service | |
| tech. | 接线员服务; 操作员业务; 操作员服务 |
| position system | |
| hydroel.st. | 定位系统 |
| |||
| 接线员服务; 操作员业务; 操作员服务 | |||
|
operator services : 16 phrases in 7 subjects |
| Automobiles | 2 |
| Aviation | 2 |
| Business | 2 |
| Electronics | 5 |
| Information technology | 2 |
| Technology | 2 |
| Telecommunications | 1 |