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In this work , three Ti-6Al-4 V powder lots produced by two different techniques , namely , plasma atomization and gas atomization , were selected and characterized .
 material: Ti-6Al-4 V powder; concept or principle: plasma; manufacturing process: atomization; manufacturing process: gas atomization
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: Ti-6Al-4 V powder, plasma, atomization, gas atomization 
Answer:
 material: Ti-6Al-4 V powder; concept or principle: plasma; manufacturing process: atomization; manufacturing process: gas atomization