7709
The experimental results demonstrate that the proposed hybrid multi-objective optimization approach is beneficial to minimize the conflict between the printed line features , hence the lines can be produced with low line edge roughness and sufficient line thickness .
 experimental, optimization, be, roughness
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:
 experimental, optimization, be, roughness