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Crystal structure of activated carbon fiber roll structure different from that picture closely, tathis structure of graphite. Such a structure allows the carbon fiber roll has the same properties in all directions or called an SEO tropic (isotropic), which is the essential properties of coated samples with complex shapes. Originally a single carbon fiber roll is coated particles in nuclear reactors, nuclear fuel. Later, at the age of 60 (1948 1960-1969) Carbon fiber roll is used valve opening instead of plastic and metal artificial heart valve that was previously used because it has properties compatible with blood, the blood does not clot as the handle. Unlike heart valve made from two types of materials that make the blood clot, and there catch a life short.
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