1076
Finally , the selection pattern of spectrum feature subset was investigated , before revealing the correlation mechanism of the selected lines spectrum and weld process .
 concept or principle: pattern; engineering feature: feature; concept or principle: mechanism; engineering feature: weld; concept or principle: process
Please list all entity words in the text that fit the category.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} 
Answer:
 concept or principle: pattern; engineering feature: feature; concept or principle: mechanism; engineering feature: weld; concept or principle: process