Leave and offer well gainful trade, patent technology, patents, CZ, EU and Germany, it is the installation of solar hot water collectors for heating, hot water and swimming pool, large energy savings, proprietary technology, references, know-how, architects, designers, contractors etc. Modern technology, and international awards, for starters I will help with assembly....Reason : age, disease..... Price ?? mil. CZK, Please only serious candidates, the latter is power. Only personal meetings!!!