The tunnel-specific branch waterproof box is a waterproof box specially developed by our company for tunnel cable installation and waterproof requirements for cable joints. Taking into account the complexity of the tunnel construction environment and the cable installation location, this product has been optimized for product installation and cable wiring, making the box installation simpler and more convenient for operation. This model is suitable for cable branch wiring with a main line less than 30 mm and a branch line less than 25 mm.