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RTG crane is the short of "rubber tired crane", also called mobile crane, it is one type of crane, refers to the crane which can travel on the trackless road with or without load. It depends on its self stability.
Normally, the crane always have trolley and hook which is lifting by steel wire rope. The power supply of the crane can be steam engine, internal combustion engine or electric motor. When the crane operate controls the crane, his command will be finally come true by the hook lifting and the trolley travelling.
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