| 摘要 |
The vacuum fresh-maintaining plastic bag, wherein it includes two layer thin film, and the two opposite inner surface of each of the thin film is non planar surface. In the present utility model, while the vacuum fresh-maintaining plastic bag is being vacuum pumped, since the channels and the pits of the two opposite inner surfaces are intersected to each other, the air is discharged to the outside of the bag along the channels as a result of not forming the suction region near the suction nozzle and greatly improving the vacuum degree of the packaging bag.
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