9257
Additionally , the effects of the input variables , including powder flow rate , gas flow rate and particle size , on the powder stream distribution were also analyzed .
 process parameter: powder flow rate; process parameter: gas flow rate; concept or principle: particle; material: powder; concept or principle: distribution
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: 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} 
 Entities: powder flow rate, gas flow rate, particle, powder, distribution 
Answer:
 process parameter: powder flow rate; process parameter: gas flow rate; concept or principle: particle; material: powder; concept or principle: distribution