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HvxzdtExcavators are heavy construction equipment consisting of a boom, grab (or stick), bucket and cabin on a rotating platform known as the "house". [1] The house is sitting on a tracked or rolling undercarriage. They are a natural progression from steam paddles and are often mistakenly referred to as power paddles. All movement and functions of a hydraulic excavator are carried out using hydraulic cylinders and hydraulic motors, as well as hydraulic fluid. [2] Due to the linear operation of the hydraulic cylinders, their operating manner is fundamentally different from cable excavators that use winches and steel ropes to perform the movements.