It could be firmly hot sealed and strongly laminated between different layers of material; four cornered solid construction make it also has good function of resistance of the water and oxygen .
此产品具有防静电功能好、抽真空效果佳、透明度高、透（氧）气率低、防潮性能好、抗拉强度与耐穿刺强度高、易热封、密封性好、不易老化等特点。
When we say "everlasting delight", we are contradicting ourselves no less than when we call a circle four-cornered or a motion motionless.
我们说永远快乐，正好像说四方的圆形，静止的动作同样地自相矛盾。
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