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SLM manufacturing of high thermal conductivity metals is particularly difficult .
 manufacturing process: SLM manufacturing; machanical property: thermal conductivity; 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: SLM manufacturing, thermal conductivity, metals 
Answer:
 manufacturing process: SLM manufacturing; machanical property: thermal conductivity; material: metals