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SEM and micro-CT was performed on aB-built samples to verify structural integrity .
 process characterization: SEM; process characterization: micro-CT; concept or principle: samples; machanical property: structural integrity
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:
 process characterization: SEM; process characterization: micro-CT; concept or principle: samples; machanical property: structural integrity