Copper-clad flat steel (copper-coated steel flat wire) is produced through cold rolling and hot drawing processes, achieving metallurgical fusion between copper and the steel core. This product boasts thick copper layers, strong corrosion resistance, low resistivity, and easy and quick installation, and is widely used in grounding systems for transmission and transformation lines, power stations, buildings, and antennas, often serving as horizontal grounding bodies, replacing expensive copper bars. It can also be used in grounding systems for electronic devices like computers, and can be combined with lightning rods (lightning conductors, lightning lines) and down conductors to form a lightning protection grounding series. Compared to traditional grounding with pure copper materials, the cost is significantly reduced.