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Solar "Death Ray" Melting a Saw Blade Steel with a 65" Spot Fresnel Lens Obsidian

http://greenpowerscience.com/index.html This is our big sub -level 2 lens. I have one that is even stronger. The saw blade is solid steel. Total time through the blade was 3 minutes. All other melts were realtime.
Length: 05:10

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