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Selective laser melting ( SLM ) is a promising manufacturing technique for the production of complex metallic components .
 manufacturing process: Selective laser melting; manufacturing process: SLM; manufacturing process: manufacturing; manufacturing process: production; material: metallic; machine or equipment: components
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, manufacturing, production, metallic, components 
Answer:
 manufacturing process: Selective laser melting; manufacturing process: SLM; manufacturing process: manufacturing; manufacturing process: production; material: metallic; machine or equipment: components