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| Doppellinie f | |||
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| Doppellinien Ceph. (на ростре) | |||
| Doppellinien f | |||
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| in doppelter Liniendarstellung | |||
| двойная линия: 13 phrases in 9 subjects |
| Astronomy | 2 |
| Aviation | 1 |
| Chemistry | 1 |
| Electric traction | 1 |
| Electronics | 3 |
| Geophysics | 1 |
| Optics branch of physics | 1 |
| Radio | 1 |
| Радиоактивное излучение | 2 |