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.

• 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。