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Selective laser melting ( SLM ) is a commonly used powder bed fusion metal additive manufacturing ( AM ) process .
 manufacturing process: Selective laser melting; manufacturing process: SLM; manufacturing process: powder bed fusion; manufacturing process: metal additive manufacturing; manufacturing process: AM; 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: Selective laser melting, SLM, powder bed fusion, metal additive manufacturing, AM, process 
Answer:
 manufacturing process: Selective laser melting; manufacturing process: SLM; manufacturing process: powder bed fusion; manufacturing process: metal additive manufacturing; manufacturing process: AM; concept or principle: process