Since1969 we have arranged and invited to symposia, hosted by the countries in turn. An exhibition has turned into a more and more important part of the symposium. Programme and contents follow the development within the R3 technique, giving the participants an excellent opportunity to assimilate both basic and new knowledge within all parts of the technique. The symposium also offers excellent occasions to new valuable contacts within the R3 sphere. The exhibition, with participating companies from all over Europe, offers both a wide spectrum of products for the public and unique business opportunities and business-to-business relations for the participating companies.