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Fresnel Lens pool heating optionby GREENPOWERSCIENCE
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Solar Death Ray (TV Fresnel Lens)by bennelson
Salvaging the Fresnel Lens from a Rear Projection TVby Tool Using Animal
DIY SOLAR TUBES EVACUATED VACUUM TUBE Solar water heaterby GREENPOWERSCIENCE
DIY key making or key copyingby GREENPOWERSCIENCE
Sun compass Videoby gaiatechnician
Non-PV Solar Powerby bananafred
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