What should we pay attention to when the bag is sealed with a seam and sealed?

The bag needs to be sealed with a suture before loading the product, and the product is sealed with a suture. Before the bottom of the seam and the seam, the bottom of the bag and the mouth of the bag need to be folded toward one side. When sewing, the single strand is placed on the side without the fold, and the three strands are placed on the side with the fold. In this way, the bag is not easy to crack.
 
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