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The cost-effectiveness of metal powder bed fusion ( PBF ) systems in high-throughput production are dominated by the high cost of metallic powder materials .
 manufacturing process: metal powder bed fusion; manufacturing process: PBF; manufacturing process: production; material: metallic powder; concept or principle: materials
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: metal powder bed fusion, PBF, production, metallic powder, materials 
Answer:
 manufacturing process: metal powder bed fusion; manufacturing process: PBF; manufacturing process: production; material: metallic powder; concept or principle: materials