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The protection mechanism was investigated using a high-speed camera , which revealed that the carbon fiber mesh spreads the striking current outside the laminate instead of penetrating inside .
 mechanism, camera, carbon fiber, laminate
Please list all entity words in the text that fit the category. Output format is "word1, 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:
 mechanism, camera, carbon fiber, laminate