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The results showed that under the same parameters and after mono-layer single-bead welding was performed using N2 as the shielding gas , the bead height was higher , the bead width was narrower , and the penetration depth was shallower .
 concept or principle: parameters; manufacturing process: welding; material: N2; material: as; concept or principle: gas; process characterization: bead; process characterization: bead width; process parameter: penetration depth
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: parameters, welding, N2, as, gas, bead, bead width, penetration depth 
Answer:
 concept or principle: parameters; manufacturing process: welding; material: N2; material: as; concept or principle: gas; process characterization: bead; process characterization: bead width; process parameter: penetration depth