They are characterized

Excavator — modern construction equipment, which is most often used to equalize construction sites, digging pits and trenches. All excavators are divided into two types: caterpillar and wheeled. The former are used in difficult conditions, when the stability of special equipment is important. Wheel models of excavators are used on even platforms. They are characterized by increased maneuverability and mobility, therefore they are the most popular in our time.