图上有各种形式的线条，诸如：边框线、实线、虚线、剖面线、中心线、引出线、尺寸线、断裂线、假想线。
There are various types of lines on the drawing such as: border lines, visible lines, invisible lines, break lines, phantom lines.
图上有各种形式的线条，诸如：边框线、实线、虚线、剖面线、中央线、引出线、尺寸线、断裂线、假想线。
There are various types of lines on the drawing such as: border lines visible lines invisible lines break lines phantom lines.
剖面线虚线画尺是一种多功能的绘图工具。
A ruler for drawing a cross section line and a dotted line is a multifunctional drawing tool.
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