 |
| |||
| bifilar electrometer (version of string electrometer); two-fibre electrometer | |||
| двунитный электрометр: 3 Phrasen in 1 Thematik |
| Messgeräte | 3 |
|
| |||
| bifilar electrometer (version of string electrometer); two-fibre electrometer | |||
| двунитный электрометр: 3 Phrasen in 1 Thematik |
| Messgeräte | 3 |