Adopting high-grade quality hot-dipped galvanized steel band (formed through cold bending by the equipment, produced strictly according to the GB/T11981-2001 standard). The surfaces of the products are dealt with diagonal, reticulation weave and small pane weave, which all apply for the patents. The products dealt with pressed flower process are with the beautiful appearance and intensity toughness, besides, it can add 20% more than common paintless keel.