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Extrusion-based AM ( i.e. , fused filament fabrication , FFF ) is compatible with a wide variety of thermoplastic polymer and composite materials , and can be deployed across a wide range of length scales .
 AM, fused filament fabrication, FFF, thermoplastic polymer, composite materials, be, range, length scales
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:
 AM, fused filament fabrication, FFF, thermoplastic polymer, composite materials, be, range, length scales