17152
According to the regression coefficients significance of the quadratic polynomial model , the optimum extrusion parameters were as follows : extrusion temperature , 115 degrees C ; feed moisture , 31 % ; and screw speed , 180 rpm .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 None