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冷轧优质薄钢板：主要包括各种优质钢冷轧薄板，最常用的是碳素结构钢板，尤其是深冲压用冷轧薄钢板，是由低碳优质钢08Al冷轧的薄板，钢板

按表面质量分为三组；Ⅰ、Ⅱ、Ⅲ，分别表示特别高级、高级、较高的精整表面,按拉延级别分为ZF、HF、F级（代表用于冲制拉延最复杂、很复杂、

复杂的零件）,根据钢板厚度允许偏差，又分为A、B两级精度、广泛用于汽车拖拉机工业。

Cold rolled high-quality steel sheet: it mainly includes all kinds of high-quality steel cold-rolled sheets. The most commonly used is carbon structural steel sheet, especially cold-rolled steel sheet for deep stamping. It is a thin sheet cold-rolled by low-carbon high-quality steel 08Al.

The steel sheet is divided into three groups according to surface quality; I, II and III respectively represent particularly high-grade,

high-grade and high-grade finished surfaces. According to the drawing level,they are divided into ZF, HF and f (representing the most complex,

very complex and complex parts used for stamping and drawing).According to the allowable deviation of steel plate thickness,

they are divided into a and B accuracy, which are widely used in automobile and tractor industry.