... in construction engineering.export: Australia, Malaysia, Indonesia,Italy.... galvanized steel frame,steel ceiling and drywall systems,Used in construction engineering.export ... , Philippines, dubai, Brazil, Colombia, Bolivia, Italy, Chile, France... steel ceiling:Main channel:25x21x0.75mm,38x12x0.8mm,36x16x0.5mm,28x20x0.6mm,Furring ...