2262
Systematic variation in RS was attributed to the sector-based laser raster strategy , which was supported by complementary finite element calculations .
 variation, laser, finite element
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:
 variation, laser, finite element