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The present study demonstrates for the first time a unique UK-designed and built Additive Manufacturing ( AM ) hybrid system that combines polymer based structural deposition with digital deposition of electrically conductive elements .
 Additive Manufacturing, AM, hybrid system, polymer, deposition, deposition, electrically, elements
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:
 Additive Manufacturing, AM, hybrid system, polymer, deposition, deposition, electrically, elements