 |
| |||
| filar voltmeter | |||
| string electrometer (gerader Faden); filament electrometer (gerader Faden); fibre electrometer (gerader Faden) | |||
| filament electrometer; string electrometer | |||
| thread electrometer | |||
|
Fadenelektrometer : 2 phrases in 1 subject |
| Measuring instruments | 2 |