Rapid advances of electric railway systems have created an increased demand for copper wires. Because of this, Tong-Da has invested in a complete line of state-of-the-art manufacturing equipment for contact wires and catenary wires. This machinery allows us to perform upwards-vertical continuous casting of oxygen-free copper wires. These products are approved by the National Railway Administration of the People’s Republic of China, meaning that our copper wire products can be used on Chinese electric trains with a speed rating of 200-250km/h, or 160km/h or lower.