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This study investigates process and post-processing methods to improve UAM steel weld quality and demonstrates the UAM fabrication of stainless steel 410 ( SS 410 ) builds which possess , after post-processing , mechanical properties comparable with bulk material .
 concept or principle: investigates; concept or principle: post-processing; manufacturing process: UAM; material: steel; concept or principle: quality; manufacturing process: UAM fabrication; material: stainless steel; material: SS; process characterization: builds; concept or principle: post-processing; concept or principle: mechanical properties; material: material
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: investigates; concept or principle: post-processing; manufacturing process: UAM; material: steel; concept or principle: quality; manufacturing process: UAM fabrication; material: stainless steel; material: SS; process characterization: builds; concept or principle: post-processing; concept or principle: mechanical properties; material: material