Scientific-production enterprise don ltd. is an engineering company and supplier of cathodic protection equipment. the staff of the enterprise have twenty years of development and manufacturing experience of the cp equipment and successfully used in their own work. since 2000 the production was transferred to the electromechanical plant Donskaya korona ltd. (bataysk region) for centralization of production and providing high quality of the equipment. all the devices offered by us are author-specific and have the special features