9045
Different types of defects in the samples were observed and classified ; some defects originated from local matrix continuity failures ( partially cured resin trapping within the polymer or bubbles formation ) , while other defects were found in the form of bulk layering .
 defects, samples, defects, cured, polymer, defects
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:
 defects, samples, defects, cured, polymer, defects