Special Exhibition "Solar Technique 77" In Hamburg: In the Future: turn the eyes of the scientists with regard of the using of solar energy. At the biggest solar technical Fair "Solar Technique 77" till now, which took place in Hamburg, new achievements in this field have been shown and discussed. to supply the great requirements of today and in future. Even now the part of solar energy - sources amounts to 20 % - already in the year 2025 it shall be 75 % Photo shows A Sun - collectors - unit for hot-water-preparation.
Photo measures 8 x 6 inches.
Photo is dated --none.
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