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The work presented here addresses thermally conductive polymer matrix composites ( specifically , graphite , carbon fiber , and silver in an acrylonitrile butadiene styrene polymer matrix ) to identify the effect of composite geometry and print direction on thermal anisotropic properties .
 polymer matrix composites, graphite, carbon fiber, silver, acrylonitrile butadiene styrene, composite, print, anisotropic
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:
 polymer matrix composites, graphite, carbon fiber, silver, acrylonitrile butadiene styrene, composite, print, anisotropic