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Acrylonitrile butadiene styrene ( ABS ) specimens fabricated by fused filament fabrication ( FFF ) were post treated by acetone , ethyl acetate and their mixed vapour .
 Acrylonitrile butadiene styrene, ABS, fabricated, fused filament fabrication, FFF, acetone
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:
 Acrylonitrile butadiene styrene, ABS, fabricated, fused filament fabrication, FFF, acetone