Characteristics of different drawing types using in spunbonded nonwovens production are introduced in the paper. Its different using range is explained.
介绍了纺粘法非织造布生产过程中所采用的不同的牵伸方式的特点，说明了其不同的使用范围。
The concreteness and abstraction of drawing arts, both of which connect and vary, make up the basic form of drawing works and the tow supporting points for drawing types.
绘画艺术的具象性和抽象性相互区别又相互联系，共同构成绘画作品的基本形态，是绘画样式的两个支撑点。
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、中心线、引出线、尺寸线、断裂线、假想线。
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