ANALYSIS OF CHANGES IN THE DISTANCE OF THE FRESNEL LENS TO THE CONCENTRATION SUR-FACE TO ENSURE THE FUNCTIONING OF THE STIRLING ENGINE von Golovko , V. M., Berezhniuk , M. M.

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ASSESSING THE FEASIBILITY OF USING AN ADDITIONAL ENERGY SOURCE TO ENSURE THE STABLE OPERATION OF A STIRLING ENGINE von Golovko , V., Berezhniuk , M.

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