把硬纸板放在袋子内部，这样它在切割的时候就会垫住一层纸，而不会让你刻穿另一面的纸。
Slide the small piece of cardboard in the flat bag, so you have a surface to cut on without cutting through the other side of the bag.
本发明垫体结实、易于清洗，还可根据需要进行任意切割、裁剪，适应不同的安置条件。
The invention also has well-knit cushion and is prone to cleaning out. Moreover it can be cut into whatever you need, so it can adapt to different embed conditions.
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