| Subject | English | German |
| tech. | single-pole double-throw relay | einpoliges Umschaltrelais (single contact) |
| tech. | single-pole single-throw relay single contact | Relais mit einpoligem Arbeitskontakt (N.C., Schliesser) |
| tech. | single-pole single-throw relay single contact | Relais mit einpoligem Ruhekontakt (N.C., Oeffner) |
| tech. | single-pole single-throw relay | einpoliges Schaltschuetz (double contact) |