以下为句子列表：
英文: Image analytical instrument is employed to study the section pattern of various deniers precursor fibers as well as quantitatively analyze and contrast their section area, perimeter, roundness and diameter.
中文: 采用图像分析仪研究了不同纤度原丝的截面形态，并对截面面积、周长、圆度、直径进行了定量分析、比较。
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