5470
Massive stacking faults and annealing twins formed in the selective laser melting fabricated 304L stainless steel .
 annealing, selective laser melting, fabricated, stainless steel
Please list all entity words in the text that fit the category. Output format is "word1, 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:
 annealing, selective laser melting, fabricated, stainless steel