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本文概述了国内外的一些资料,并结合自己的实验作了分析,从而提出,由于计算方法不同而引起蠕化率的差别,面积法较计数法合乎情理,也较适合国情。
This article summarizes some domestic and foreign materials and analyzes with our own experiments. It is proposed that the area ratio method is more reasonable than the counting method due to different calculation methods and is more suitable for the national conditions.