5375
The relationship between the numbers of created spatter particles , induced unmelted regions and density variability are interpreted and discussed based on other observations , such as microscopic examination and density analysis of SLM parts .
 spatter, particles, density, as, density, SLM
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:
 spatter, particles, density, as, density, SLM