| 摘要 |
<p>The two side walls of the bag are welded or adhered together and the top of the bag is sealed with a double fold whilst the handle, which is made from a strip of plastic film is tucked into the double fold when the bag is folded up. The ends of the handle are welded into the side wall seams. Pref. the bag and handle can be made from polyethylene or the handle can be made from a stronger plastic esp. polyamide, and the bottom of the bag is closed with a flip-lock.</p> |
