1791
In addition , raw materials often need to be presented with well-defined morphology , like in filament or carefully-graded powder distributions .
 material: raw materials; material: be; concept or principle: morphology; material: filament; material: powder; concept or principle: distributions
Please list all entity words in the text that fit the category.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} 
Answer:
 material: raw materials; material: be; concept or principle: morphology; material: filament; material: powder; concept or principle: distributions