Sami Altınkaya BETONSTAR - NTV Economic Notes Broadcast Bauma 2019 - Chairman of the Board Oğuz Diken | April 19, 2019
Sami Altınkaya Outlet Road - Concrete Istanbul Fair 2017 - Chairman of the Board Oğuz Diken | 12 April 2017
TRMCA Organisation- concrete Istanbul Turkey Ready Mixed Concrete Association Congress 2017 Chairman of the Board of Directors of the Main Sponsor Oguz Diken Betonstar
