A flat drafting instrument with curved edges and several scroll-shaped cutouts, used as a guide in drawing curves when constructing graphs or making engineering drawings.
英
美
释义
曲线板一种带有曲线边和几个可剪下的漩涡形图样的扁平制图工具,当制表或绘制工程图时,用作画曲线的定向瞄准装置
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