A job name. Punching holes in packaging is a special job in clothing industry. Jujube is commonly used in clothes, especially jeans and tooling, and mainly plays a reinforcing role. Dating lines are very common in clothes and trousers, which are used to reinforce pockets, cuffs and other easily damaged positions. "wrapping dates" is also called knotting and knotting, which is common in clothes and trousers. Its function is to reinforce the easily damaged positions such as pockets and cuffs. In order to strengthen the firmness of use, a special machine is used to sew back and forth several times with a high density of stitches.