1534
The FE distortion was then used in a numerical procedure to reverse distortion directions in order to produce a new impeller with mitigated distortion .
 FE, distortion, distortion, distortion
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:
 FE, distortion, distortion, distortion