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Such a effect is a complex metallurgical process that leads to a rough surface and residual powder particles .
 application: metallurgical; concept or principle: surface; material: residual powder; concept or principle: particles
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:
 application: metallurgical; concept or principle: surface; material: residual powder; concept or principle: particles