non-specified
| time relay
| non-specified | |
| health. | non specificato |
| time relay | |
| PSP | Relè temporizzato; Relè a tempo |
| |||
| non specificato | |||
|
non-specified : 5 phrases in 3 subjects |
| Electronics | 3 |
| Industry | 1 |
| Power system protection | 1 |