以下为句子列表：
英文: The beeline distortion face often needs to be spread into an ichnography during drawing the reinforcement drawings for the inlet and outlet of the hydraulic structure, so as to show the length of the reinforcing steel bar directly.
中文: 摘要在绘制直线扭曲面钢筋图时常常需要将其展开为平面图形，以直观地显示钢筋的长度。
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英文: Then by using enlarged edge character method, outline distortion can be overcomed and correct image can be matched.
中文: 在此基础上，用扩展边缘特征法，克服轮廓变形对边缘匹配的影响，提高精度。
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