 |
bifilar
| oscillograph
| bifilar | |
| earth.sc. el. | bifilaire |
| oscillograph | |
| nat.sc. | oscillographe |
| tech. el. | vibrographe |
| |||
| bifilaire | |||
| à deux fils | |||
| bifilar: 17 phrases in 6 subjects |
| Coal | 1 |
| Electronics | 5 |
| Measuring instruments | 7 |
| Natural sciences | 1 |
| Sound recording | 2 |
| Technology | 1 |