... are tianjin BEILDING SYSTEN steel 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, ... on.as for the corrugated steel sheets, we specialize in roofing panels and wall panels. here are twenty kinds ...