... .export: Australia, Malaysia, Indonesia,Italy.... galvanized steel frame,steel ceiling and drywall systems,Used in construction engineering.export ... dubai, Brazil, Colombia, Bolivia, Italy, Chile, France... steel ceiling:Main channel:25x21x0.75mm,38x12x0.8mm,36x16x0.5mm,28x20x0 ... 58x35x17x7x0.45mm, 68x35x22x12x0.45mm,70x35x40x12x0.45mm,80x50x22x12x0.5mm steel stud:1,Size 40*35mm,50x35mm, 70x35mm, ...