Overhead transmission lines are the most common method, using large towers and poles to carry uninsulated conductors. This is typically the most cost-effective and easiest to maintain option. underground transmission cables, on the other hand, are buried in trenches or tunnels. While more expensive to install, they are less susceptible to weather damage and have a smaller visual impact. At Ningbo Changshi, we offer a comprehensive range of equipment and tools for both types of projects, including our specialized OHTL wire cable conductor tension stringing equipment for overhead lines and a variety of tools for underground cable laying.