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A pivotal tool to characterize structures for biomimicry or bio-inspiration is X-ray micro-computed tomography , as reviewed in .
 machine or equipment: tool; concept or principle: biomimicry; concept or principle: bio-inspiration; process characterization: X-ray micro-computed tomography; material: as
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:
 machine or equipment: tool; concept or principle: biomimicry; concept or principle: bio-inspiration; process characterization: X-ray micro-computed tomography; material: as