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SOALR Backyard Obsidian with the use of a large Fresnel Lens
Projection Fresnel Lens Linear to Spot Conversionby GREENPOWERSCIENCE
Giant Fresnel Lens Deathray: An Experiment in Opticsby DrSimons
Portable Fresnel Solar Ovenby Renard_Bleu
Solar cooking blackened seafood parabolic mirror Fresnel Lensby GREENPOWERSCIENCE
Fresnel Lens pool heating optionby GREENPOWERSCIENCE
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