| |||
| Hauptfeder f; treibende Kraft; Uhrfeder f; Zugfeder f | |||
| Antriebsfeder f | |||
| Triebfeder f | |||
| Hahnfeder f; Schlagfeder f; Schließfeder f | |||
| |||
| Uhrfedern f; Hauptfeder f | |||
|
mainspring : 20 phrases in 3 subjects |
| Industry | 5 |
| Mechanic engineering | 3 |
| Weapons and gunsmithing | 12 |