| 摘要 |
The bag has a trapezoidal shape including a pair of parallel edges opposite each other with one longer than the other and a pair of opposite diverging edges. One edge of the bag is defined by a fold to close off an opening providing access into the bag. Other edges of the bag are formed by a seam joining two opposite layers of flexible material together. The opening is preferably provided on a flap which extends beyond the trapezoidal perimeter of the bag. When this flap is folded over, the final trapezoidal shape for the bag is provided. Walls are built utilizing a plurality of such trapezoidally shaped sandbags in alternating parallel orientations for the long edges and short edges of adjacent bags. Joints between adjacent sandbags are longer than with rectangular sandbags and interlock together somewhat.
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