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This work shows that nitrogen-alloyed austenitic stainless steels can be processed by L-PBF and the mechanical properties can be improved .
 material: austenitic stainless steels; material: be; manufacturing process: L-PBF; concept or principle: mechanical properties; material: be
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, be, L-PBF, mechanical properties, be 
Answer:
 material: austenitic stainless steels; material: be; manufacturing process: L-PBF; concept or principle: mechanical properties; material: be