| |||
| 试验继电器 | |||
|
test relay : 14 phrases in 6 subjects |
| Hydroelectric power stations | 1 |
| Management | 2 |
| Power system protection | 1 |
| Shipbuilding | 3 |
| Space | 2 |
| Technology | 5 |
| |||
| 试验继电器 | |||
|
test relay : 14 phrases in 6 subjects |
| Hydroelectric power stations | 1 |
| Management | 2 |
| Power system protection | 1 |
| Shipbuilding | 3 |
| Space | 2 |
| Technology | 5 |