Güleryüz, one of the leading names in the bus world, celebrated his 55th birthday and received the certificate of the R&D Center he established in accordance with the law numbered 5746. Investing in the future. Güleryüz, one of the leading names of the bus world, who invests in the future, celebrated 55th birthday and received the certificate of the R&D Center she established in accordance with the law numbered 5746.