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The Al wire was fed in TOP-TIG welding mode but the Ti6Al4V wire was fed in conventional TIG welding mode .
 material: Al; manufacturing process: welding; material: Ti6Al4V; manufacturing process: TIG welding
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: Al, welding, Ti6Al4V, TIG welding 
Answer:
 material: Al; manufacturing process: welding; material: Ti6Al4V; manufacturing process: TIG welding