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      <marc:subfield code="a">"A digital twin is a highly complex digital replica of a physical entity, such as an aircraft engine, a manufacturing process, a person or even an entire city. The twin takes in data from its counterpart and uses it to make predictions or create simulations of how the physical object or system will react in the real world. Organizations use digital twins to remotely troubleshoot equipment, optimize supply chains and develop enhancements to products and services"--Page [1].</marc:subfield>
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