279
A theoretical model applied for the LMH interaction with metal powders attributes a magnetic heating effect also to powders made of non-magnetic metals , due to eddy currents .
 concept or principle: theoretical model; material: metal powders; manufacturing process: heating; material: powders; material: metals
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: theoretical model, metal powders, heating, powders, metals 
Answer:
 concept or principle: theoretical model; material: metal powders; manufacturing process: heating; material: powders; material: metals