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Heat transfer and fluid flow are simulated for different material and process conditions .
 concept or principle: Heat transfer; machanical property: fluid flow; material: material; concept or principle: process
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: Heat transfer, fluid flow, material, process 
Answer:
 concept or principle: Heat transfer; machanical property: fluid flow; material: material; concept or principle: process