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Glasses can be patterned layer-by-layer as in conventional fused deposition modeling but also along 3D , “ freeform ” paths .
 Glasses, be, layer-by-layer, as, fused deposition modeling, 3D, freeform
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:
 Glasses, be, layer-by-layer, as, fused deposition modeling, 3D, freeform