Matches in DBpedia 2015-10 for { ?s ?p "third order Fresnel lens"@en }
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- Hook_Lighthouse currentlens "third order Fresnel lens".
- Brandywine_Shoal_Light lens "third order Fresnel lens".
- Lansing_Shoals_Light_Station lens "third order Fresnel lens".
- Port_Burwell_Marine_Museum_and_Historic_Lighthouse lens "third order Fresnel lens".
- Sanibel_Island_Light lens "third order Fresnel lens".