 |
| |||
| class 4/5 system; combined exchange; combined local/toll system; combined local/transit exchange; combined system | |||
|
central combinada : 6 短语, 4 学科 |
| 材料科学 | 2 |
| 环境 | 1 |
| 电子产品 | 1 |
| 通讯 | 2 |
|
| |||
| class 4/5 system; combined exchange; combined local/toll system; combined local/transit exchange; combined system | |||
|
central combinada : 6 短语, 4 学科 |
| 材料科学 | 2 |
| 环境 | 1 |
| 电子产品 | 1 |
| 通讯 | 2 |