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An effective way to make the computational cost of these analyses affordable is to model powder and molten metal as continuous media , wherein all the heat transfer modes occurring in the liquid are simulated as lumped fictitious heat conduction .
 concept or principle: model; material: molten metal; material: as; concept or principle: heat transfer; material: as; concept or principle: heat conduction
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: manufacturing standard, machanical property, manufacturing process, material, engineering feature, process parameter, machine or equipment, application, process characterization, enabling technology, biomedical, concept or principle 
Text: {0} 
 Entities: model, molten metal, as, heat transfer, as, heat conduction 
Answer:
 concept or principle: model; material: molten metal; material: as; concept or principle: heat transfer; material: as; concept or principle: heat conduction