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To assess the process stability , single line scans were made from 316L stainless steel powder .
 concept or principle: process; material: 316L stainless steel powder
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: process, 316L stainless steel powder 
Answer:
 concept or principle: process; material: 316L stainless steel powder