3105
Finally , the performance of the PFF system is evaluated in terms of nozzle geometry , print speed , and reproducibility showing that reproducible green part properties are achieved at a maximum speed of 8.18 mm/s while using a tapered FFF nozzle .
 performance, nozzle, geometry, print, reproducibility, green part, FFF
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:
 performance, nozzle, geometry, print, reproducibility, green part, FFF