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The use of more advanced binder-free additive manufacturing technique such as Electron Beam Melting ( EBM ) allows obtaining fully-dense magnetic materials with advanced topology and complex shapes .
 binder-free, additive manufacturing, as, Beam, EBM, materials, topology, complex shapes
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:
 binder-free, additive manufacturing, as, Beam, EBM, materials, topology, complex shapes