relay-type
| graphic instrument
| relay types | |
| el. | tipo di rele |
| graphic instrument | |
| automat. | strumento registratore |
| |||
| tipo di rele | |||
|
relay-type : 11 phrases in 5 subjects |
| Communications | 1 |
| Earth sciences | 2 |
| Electronics | 2 |
| Measuring instruments | 4 |
| Mechanic engineering | 2 |