4669
Appearing procesB-related flaws such as different amounts of crystallinity , surface roughness , and defects such as pores exhibit dimensions similar to the wall thickness .
 flaws, as, surface roughness, defects, as, dimensions, wall thickness
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:
 flaws, as, surface roughness, defects, as, dimensions, wall thickness