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In addition to enhancing our fundamental understanding of polymer extrusion based additive manufacturing and its influence on thermal properties of built parts , results presented here may facilitate process optimization towards parts with desired thermal and multi-functional properties .
 manufacturing process: polymer extrusion; manufacturing process: additive manufacturing; concept or principle: thermal properties; concept or principle: process optimization; concept or principle: properties
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: polymer extrusion, additive manufacturing, thermal properties, process optimization, properties 
Answer:
 manufacturing process: polymer extrusion; manufacturing process: additive manufacturing; concept or principle: thermal properties; concept or principle: process optimization; concept or principle: properties