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The ability to create parts with complex geometries is one of the most important advantages of this technology , allowing the production of complex functional objects from various materials including plastics and metals that can not be easily produced by any other means .
 concept or principle: complex geometries; concept or principle: technology; manufacturing process: production; machine or equipment: complex functional objects; material: various materials; material: plastics; material: metals; material: be
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:
 concept or principle: complex geometries; concept or principle: technology; manufacturing process: production; machine or equipment: complex functional objects; material: various materials; material: plastics; material: metals; material: be