Various specifications of horizontal directional drilling machines are composed of drilling system, power system, directional control system, mud system, drilling tools and auxiliary tools. Their structure and functions are described as follows:1. Drilling rig system: it is the main body of the dril

The characteristics of horizontal directional drilling construction are as follows:1. Directional drilling crossing construction will not hinder traffic, destroy green space and vegetation, affect the normal life and work order of shops, hospitals, schools and residents, and solve the interference o