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.

youdao

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.

youdao