====== Materials ======

===== KEVLAR =====
  * [[wp>Kevlar]]
  * 凯夫拉 [[http://baike.baidu.com/link?url=dQuVHIGNCE5t4yk8wREgmhNbAyd9LHj3FlGtrNe12JGuezgdkEIPoJ3oNBAj5x9Km1Bt7CGvyjTjUpv8GKAKxq|百度词条]]