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The effect of electrode positive time cycle ( % EP ) of the alternating current TIG process has been investigated for aluminium wire + arc additive manufacture of linear walls .
 machine or equipment: electrode; manufacturing process: TIG process; material: aluminium; concept or principle: arc; manufacturing process: additive manufacture
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: electrode, TIG process, aluminium, arc, additive manufacture 
Answer:
 machine or equipment: electrode; manufacturing process: TIG process; material: aluminium; concept or principle: arc; manufacturing process: additive manufacture