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double-pole single- throw switch : 5 phrases in 5 subjects |
| Electronics | 1 |
| Hydroelectric power stations | 1 |
| Navigation | 1 |
| Space | 1 |
| Technology | 1 |
|
double-pole single- throw switch : 5 phrases in 5 subjects |
| Electronics | 1 |
| Hydroelectric power stations | 1 |
| Navigation | 1 |
| Space | 1 |
| Technology | 1 |