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| Heizfadenstrom m; Heizstrom m | |||
| Heizstrom m (filament) | |||
| courant de chauffage: 12 phrases in 9 subjects |
| Antennas and waveguides | 1 |
| Chemistry | 1 |
| Electronics | 2 |
| Materials science | 1 |
| Medical appliances | 1 |
| Metallurgy | 1 |
| Transport | 1 |
| Vacuum tubes | 2 |
| Радиоактивное излучение | 2 |
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