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This work investigated the processing of high nitrogen-alloyed austenitic stainless steels by laser powder bed fusion ( L-PBF ) .
 material: austenitic stainless steels; manufacturing process: laser powder bed fusion; manufacturing process: L-PBF
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: austenitic stainless steels, laser powder bed fusion, L-PBF 
Answer:
 material: austenitic stainless steels; manufacturing process: laser powder bed fusion; manufacturing process: L-PBF