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[1] Cheap solar concentrating mirror

[2] Cheap waterwheel !

[3] Extract gasoline from stones, rocks and seawater

[4] Build your own solar systems

[5] Magneto-hydronamic power systems

[6] Solar system documentations

[7] Interesting and useful digital power meter

[8] Outdoor strong light LED modules

[9] HHO watergas, very low power water electrolysis !

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