In the early nineties, we worked with maid services and we got vacuum bags.

- 九十年代初，我们与女佣服务机构合作，并获得了真空袋。

When compressed in a vacuum bag, the material becomes stiff enough to support over a kilogram of weight.

当在真空袋中压缩时，材料变得足够坚硬以支撑超过一公斤的重量。