| |||
| 直流开关 | |||
|
DC switch : 8 phrases in 7 subjects |
| Communications | 1 |
| Electric machinery | 1 |
| Electricity | 2 |
| Hydroelectric power stations | 1 |
| Metallurgy | 1 |
| Power electronics | 1 |
| Technology | 1 |
| |||
| 直流开关 | |||
|
DC switch : 8 phrases in 7 subjects |
| Communications | 1 |
| Electric machinery | 1 |
| Electricity | 2 |
| Hydroelectric power stations | 1 |
| Metallurgy | 1 |
| Power electronics | 1 |
| Technology | 1 |