9251
Weight measurement method was used to validate the powder flow distributions at different positions under the nozzle .
 Weight, measurement, powder, distributions, nozzle
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:
 Weight, measurement, powder, distributions, nozzle