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The beneficial effects from using these additive binder particles can be improved by maximising the binder particle size , enabling the space within the powder bed to be filled with a higher packing efficiency .
 additive, particles, be, binder, powder bed, be
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:
 additive, particles, be, binder, powder bed, be