585
In this study , a novel hydrodynamic cavitation abrasive finishing ( HCAF ) technique is proposed and its feasibility for surface finishing is analyzed .
 concept or principle: cavitation; material: abrasive; concept or principle: feasibility; manufacturing process: surface finishing
Given options, please tell me the categories of all the listed entity words.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} 
 Entities: cavitation, abrasive, feasibility, surface finishing 
Answer:
 concept or principle: cavitation; material: abrasive; concept or principle: feasibility; manufacturing process: surface finishing