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1 and 2 illustrate the bonding mechanism in the FDM of polymer composites along crosB-section of printed parts .
 process characterization: bonding mechanism; manufacturing process: FDM; material: polymer composites
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: 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:
 process characterization: bonding mechanism; manufacturing process: FDM; material: polymer composites