6913
An image-processing technique is then employed to isolate the laser nozzle and melt pool in the captured images .
 laser, melt pool, images
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:
 laser, melt pool, images