High tensile strength steel; high tensile strength steel sheets; high tensile strength steel pipes; high tensile strength steel bars; high tensile strength * steel * wires; building and construction materials of metal made of high tensile strength steel, namely, metal door frames, steel frames for building, metal window frames, metal greenhouse frames, metal ceiling panels, metal roofing panels, wall panels of metal, metal door panels and metal fence panels; prefabricated buildings made of hi...