Power cables and wires as well as stainless steel products are widely available for the construction industry. Power cables and wires are provided to office, plant, and residential buildings for indoor wiring, electric device wiring and control wiring, as well as maintenance of normal operation of indoor fire safety equipment, fire alarm and emergency power supply systems. They are also used in generators, electric welders, and other electric devices. Stainless steel products are used in roofs, exterior wall panels, steel structure bridges, as well as gas and liquid pipes.