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Large-scale ( big area additive manufacturing , BAAM ) tests ( flexural properties ) showed 62 % improvement in the anisotropy ratio for modulus , 77 % improvement in the anisotropy ratio of the strength , 56 % improvement in the anisotropy ratio of elongation at break , and 55 % improvement of the anisotropy ratio of the Charpy impact strength over the control PA values .
 area, additive manufacturing, properties, anisotropy, anisotropy, strength, anisotropy, elongation, anisotropy, impact, PA
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:
 area, additive manufacturing, properties, anisotropy, anisotropy, strength, anisotropy, elongation, anisotropy, impact, PA