... structure co,.ltd, we specialzied in floor deckings, color corrugated steel sheets,ect. we are tianjin BUILDING SYSEN steel structure co,.ltd ... , we specialize in steel floor deckings, color corrugated steel sheets, color steel tiles, sandwich panels, Al-Mg-Mn roof ... panels and so on.as for the corrugated steel sheets, we specialize in roofing panels and wall panels. here ...