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The results of 3-D printing three case study objects of increasing geometric complexity using the process methodology improvements presented , which show resolution of 1 mm bead widths .
 3-D, case study, complexity, process methodology, resolution, mm, bead widths
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:
 3-D, case study, complexity, process methodology, resolution, mm, bead widths