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Wang investigated the development of grain structure mechanism of 316L stainless steel fabricated by selective laser melting and mechanical property characterization .
 concept or principle: grain structure; material: 316L stainless steel; manufacturing process: selective laser melting; process characterization: mechanical property characterization
Please list all entity words in the text that fit the category.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} 
Answer:
 concept or principle: grain structure; material: 316L stainless steel; manufacturing process: selective laser melting; process characterization: mechanical property characterization