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笔者测量了60付桡、尺骨的最大长度及骨干中下1/3交界处断面的各项指标,并对所得数据进行了相关回归分析,结果表明,桡骨与尺骨长度、外径与皮质厚度及内径与外径呈直线相关,说明骨干越粗、皮质厚度与骨髓腔越大.“,”We measured the largest lengths and various indexes about middle-under 1/3 trunk sections of 60radii and ulnas. And we carried correlation and regression analysis of these data. The results showed the linear correlation between radius and ulnas length. external diameter and cortex thickness, and internal and external diameter,indicating that cortex thickness and bone marrow cavity became large following bone increased trunk thickness.