3175
Example monofilaments include “ microprinted ” monofilaments that contain an arbitrary image embedded in the monofilament cross section ; microfluidic monofilaments in which flow channels are formed by combining optically transparent and opaque materials ; dual-material monofilaments that combine ABS and polycarbonate into a regular spoked geometry with five-fold symmetry ; and a microfluidic preform co-fed with glass optical fiber , allowing both fluid and light transmission through the monofilament .
 image, cross section, transparent, materials, dual-material, ABS, polycarbonate, geometry, glass, fiber, fluid, transmission
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:
 image, cross section, transparent, materials, dual-material, ABS, polycarbonate, geometry, glass, fiber, fluid, transmission