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The average UTS of the thin-wall sample protected by N2 in the horizontal direction was 82.5 % of the UTS of the samples shielded using Ar .
 concept or principle: average; concept or principle: sample; material: N2; machanical property: UTS; concept or principle: samples; enabling technology: Ar
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: average, sample, N2, UTS, samples, Ar 
Answer:
 concept or principle: average; concept or principle: sample; material: N2; machanical property: UTS; concept or principle: samples; enabling technology: Ar