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Flat plate solar collectors 2. Concentrating and pipe type solar collectors 3. Solar cookers. 4. Solar water heaters. 5. Solar crop driers and systems. 6. Solar air / gas / fluid heating system. 7. Solar refrigeration, cold storages and air conditioning system. 8. Solar stills and desalination systems. 9. Solar pumps based on solar thermal and solar photo-voltaic conversion. 10. Solar power generating system. 11. Solar photo- voltaic modules and panels for water pumping and other applications. 12. Windmills and any specially designed devices which run on windmills. 13. Any special devices including electricity generators and pumps running on wind energy. 14. Bio gas engines and bio gas plant and accessories and equipments connected therewith for utilising energy from bio gas.