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Specification and analysis of the system structure and components of a desktop additive manufacturing ( AM ) system .
 process parameter: Specification; concept or principle: structure; machine or equipment: components; manufacturing process: additive manufacturing; manufacturing process: AM
Given options, please tell me the categories of all the listed entity words.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} 
 Entities: Specification, structure, components, additive manufacturing, AM 
Answer:
 process parameter: Specification; concept or principle: structure; machine or equipment: components; manufacturing process: additive manufacturing; manufacturing process: AM