求翻译：碳纤维是有机纤维或沥青基材料经碳化和石墨化处理后形成的含碳量在85％以上的碳素纤维。在碳纤维的研究与生产上，日本和美国一直走在世界的前列。碳纤维是力学性能优异的新材料。他的比重不到钢的1／4，比铝还要轻，比强度是铁的20倍。同钛、钢、铝等金属材料相比，碳纤维在物理性能上具有强度大、模量高、密度低、线膨胀系数小等特点，可以称为新材料之王。是什么意思？

Carbon fiber is the carbon content of organic fibers or asphalt-based materials by carbonization and graphitization treatment in more than 85% carbon fiber. Research and production of carbon fiber, Japan and the United States has been at the forefront of the world. Carbon fiber is an excellent mecha

Carbon fiber is organic fibers or asphalt materials, carbon and graphite, the carbon content in more than 85 per cent of carbon fiber. The carbon fiber on the research and production, Japan and the United States has been at the forefront of the. Carbon fiber is the excellent hydraulics performance n

Or asphalt base material of carbon fiber is an organic fiber after carbonization and graphitization of carbon content in the formation of more than 85% of carbon fiber. On the research and production of carbon fiber, Japan and the United States has been at the forefront of the world. Carbon fiber is