8506
Both techniques are demonstrated through the construction of parts using an experimental large-scale 3D foam printer .
 construction, experimental, 3D, printer
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:
 construction, experimental, 3D, printer