 |
| |||
| class 4/5 system; combined exchange; combined local/toll system; combined local/transit exchange; combined system | |||
|
sistema combinado : 12 短语, 7 学科 |
| 信息技术 | 1 |
| 农业 | 1 |
| 地球科学 | 1 |
| 技术 | 1 |
| 电子产品 | 2 |
| 行业 | 1 |
| 运输 | 5 |
|
| |||
| class 4/5 system; combined exchange; combined local/toll system; combined local/transit exchange; combined system | |||
|
sistema combinado : 12 短语, 7 学科 |
| 信息技术 | 1 |
| 农业 | 1 |
| 地球科学 | 1 |
| 技术 | 1 |
| 电子产品 | 2 |
| 行业 | 1 |
| 运输 | 5 |