FIBROBETON BUILDING ELEMENTS INDUSTRY AND CONSTRUCTION INC.
KORTEK CORROSION TECHNOLOGIES Co. Ltd.
NOKSEL STEEL PIPE INDUSTRY INC.
REFERANS KİMYA LAB. DEV. Co. Ltd.
DURATEK PROTECTIVE MATERIALS INDUSTRY. AND TRADE. INC.
PRO-TEK CONSULTANCY ENGINEERING IND. AND TRADE Co. Ltd.
4Z ELECTRONIC AUTOMATION and WELDING SYSTEMS Co. Ltd.
HM CORROSION ENGINEERING CONSULTING AUTOMOTIVE INDUSTRY and TRADE Co. Ltd.
