8008
The velocity of the droplets impinging the powder bed surface might have significant effect on droplet spreading and absorption dynamics , which can be manifested in quality and integrity of the fabricated parts .
 droplets, powder bed, droplet, absorption, be, quality, integrity, fabricated
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:
 droplets, powder bed, droplet, absorption, be, quality, integrity, fabricated