7983
The robust 3D printed structure from MJ-3DG ink with the surface roughness around 2.99 ( µm ) has the resistivity as low as 0.41 ( Ω.cm ) .
 3D printed, ink, surface roughness, resistivity, as, as
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:
 3D printed, ink, surface roughness, resistivity, as, as