1. Unbacked design for allowing water to drain out, keeping the surface dry, and allowing dirt to fall beneath the mat. Make cleaning easier. 其疏水设计，方便底部水分流通，刮除的泥沙掉落于垫下，易于清理。
2. A certain amount of unbacked notes, signed by executives of The Hongkong and Shanghai Banking Corporation under duress, also went into circulation. 当时香港上海丰银行的职员在日军强迫下，签署了大量没有储备支持的纸币，这些纸币更在市面流通。
3. Individual unbacked loose fabric swatches available for all 1, 925 colors provide a precise way to select, specify, control and communicate your color choices. 所有1，925种色彩均配有独立无背卡的活页色卡，提供精确的方法来选择、说明、控制和沟通您的色彩选择。
