Self-adhesive bags: a glue bag, bought with a piece of plastic sheet covered, you need to seal the plastic sheeting tore away the glue, you can put the bag sealed, usually one-time. (Of course, you carefully ripped second time is not impossible)
1, Zifeng Dai: bag mouth has a seal line, the bag on both sides of the line on it, the pressure is closed, hard to tear open the bag can be opened, not with glue, you can repeatedly use. The company is located in:
2, paper books are self-adhesive bags.
In short, the biggest difference between self-adhesive bags and self-sealing bags can be repeated with one, a equivalent of one-time.