8861
To minimize the amount of material required , the use of a liquid bridge has been suggested as a modification to the existing microstereolithography process .
 material, bridge, as, microstereolithography
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:
 material, bridge, as, microstereolithography