899
Glass beads were used asadditives in SLS of Nylon powders , in order to determine the mechanical properties , as a function of material composition .
 material: Glass beads; manufacturing process: SLS; material: Nylon; concept or principle: mechanical properties; material: as; material: material; concept or principle: composition
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: Glass beads; manufacturing process: SLS; material: Nylon; concept or principle: mechanical properties; material: as; material: material; concept or principle: composition