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For assessing surface topography of PBF surfaces most researchers have looked at surface texture parameters ( profile - ISO 4287 and areal - ISO 25178−2 ) .
 surface topography, PBF, surface texture, parameters, profile, ISO, ISO
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:
 surface topography, PBF, surface texture, parameters, profile, ISO, ISO