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| Subject | English | German |
| el. | circuit theory | Netzwerktheorie |
| electr.eng. | circuit theory | Netzwerktheorie (study of electric and magnetic systems in which the electric and magnetic phenomena are described in terms of integral quantities. IEC 60050-131-11-02 ssn) |
| phys. | circuit theory | Schaltungstheorie |
| phys. | theory of electric circuits | Theorie der Stromkreise |
| phys. | theory of electric circuits | Schaltkreistheorie |