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Most cranes operate by first extending horizontally or vertically using hydraulic systems once the spreader has picked up the cargo. Once the crane reaches its destination, it unloads the material, and then the system retracts to return to the reclaiming point, completing a full work cycle. This process is repeated as needed. In general, lifting machinery performs tasks in a sequence: picking up, moving, and unloading, with each mechanism operating intermittently during the process. These machines are primarily used for transporting individual items. However, when equipped with specialized attachments like grabs, they can also handle bulk materials such as coal, ore, and grain. When fitted with containers or barrels, they can transport liquids like molten steel. Some lifting devices, such as elevators, are even designed to carry people. In certain industries, lifting equipment serves as the primary working machine. For instance, cranes used at ports and railway stations for loading and unloading cargo are often the main operational tools in those environments. Their efficiency and versatility make them essential in modern logistics and construction operations.
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