What is the fine-grained topic of the following text: In comparison with traditional means aramid fiber unidirectional fabric has unique advantages that it can strengthen the adaptation of structures against severe external environment to prolong the life of the structure; and the light weight and high strength of aramid fiber unidirectional fabric will add almost no volume and weight to the structure. Only return the topic.
Advantages of Aramid Fiber Unidirectional Fabric in Structural Adaptation