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本文介绍了ＲＤ法、强迫流一热梯度ＣＶＩ法和预成形纱法三种碳碳复合材料制造工艺的改进，其中重点介绍了预成形纱法。
This paper introduces the improvement of the manufacturing process of three kinds of carbon-carbon composite materials, including RD method, forced flow-thermal gradient CVI method and preformed yarn method. The preform yarn method is introduced emphatically.