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This paper aims to understand the formation and the effect of residual stress on selective laser melting ( SLM ) parts .
 machanical property: residual stress; manufacturing process: selective laser melting; manufacturing process: SLM
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: residual stress, selective laser melting, SLM 
Answer:
 machanical property: residual stress; manufacturing process: selective laser melting; manufacturing process: SLM