1003
Further , surface oxide films were fractured and dispersed by ultrasonic vibration , and metallurgical welding was achieved .
 concept or principle: surface; material: oxide; process parameter: ultrasonic vibration; application: metallurgical
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: surface, oxide, ultrasonic vibration, metallurgical 
Answer:
 concept or principle: surface; material: oxide; process parameter: ultrasonic vibration; application: metallurgical