3799
These events indicate the probability of material discontinuities ( defects ) in the metal additive manufacturing ( AM ) parts .
 probability, material, defects, metal additive manufacturing, AM
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:
 probability, material, defects, metal additive manufacturing, AM