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A generic term for a tracked or wheeled machine used for digging, earthmoving, grading or loading materials on a construction site. Wheeled machines, called 'rubber ducks' are generally used on hard ground conditions, like road surfaces, whereas tracked machines are used on soft ground conditions. Mini and midi tracked excavators are commonly used for path construction with occasional larger machines used where access is very good. The smaller micro excavators have adjustable track width for stability. All machine types rotate 360 degrees, some have zero tail swing and quick hitching systems for attaching buckets and a breaker. Machine weights range from 0.8 to 45 tonnes.


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