6243
Results from artificial lightning strikes showed that the printed carbon fiber mesh prevented damage , and the structure remained relatively intact with residual strength reaching 90.1 % at 100 kA maximum peak current .
 carbon fiber, damage, structure, residual
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:
 carbon fiber, damage, structure, residual