BNV – Budapest International Fair, 1989. Hanover Messe, Germany, 1991. Hanover Messe, Germany, 1995. Toulouse International Fair, France, 1994. Technical Fair Moscow, Russia, 1998. ÖKOTECH, Budapest, 2005. ÖKOTECH, Budapest, 2006. Buda Penta Hotel, Budapest, 2006. (Envi-Tech Symposium) Romanian Environmentel Exhibition