| 摘要 |
Bag-shaped holder of plastic sheet, with seams joining layers together along two parallel edges, has one end formed of two overlapping folded regions, which form mouth of bag between them. Specifically, bag is formed from a length of polythene tube, flattened, then folded along two lines parallel to axis of the tube, and seam-welded transversely along two open ends of the tube. |
