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Design for additive manufacturing ( DFAM ) guidelines are important for helping designers avoid iterations and leverage the design freedoms afforded by additive manufacturing ( AM ) .
 Design for additive manufacturing, design freedoms, additive manufacturing, AM
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:
 Design for additive manufacturing, design freedoms, additive manufacturing, AM