Hakuluettelo:
Käännös:
echelon lens (suomeksi)
- Määritelmät:
- A large lens constructed in several parts or layers, extending in a series of annular rings beyond the central lens, and used in lighthouses.
Viimeisimmät haut: echelon lens, anapnographs, sugar-cane, Mountain Scops Owl, reasserting, Kukkonen