EXCAVATOR
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Excavators are heavy construction equipment consisting of a boom, dipper (or stick), bucket, and cab on arotating platform known as the "house". The house sits atop an undercarriage with tracks or wheels. Theyare a natural progression from the steam shovels and are often mistakenly called power shovels. All movementand functions of a hydraulic excavator are accomplished through the use of hydraulic fluid, with hydrauliccylinders and hydraulic motors. Due to the linear actuation of hydraulic cylinders, their mode of operation isfundamentally different from cable-operated excavators which use winches and steel ropes to accomplishthe movements.
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