包装成品的形状为三边封或四边封。 三边封为常规产品，四边封需特殊定制热封器。
Three sides sealing is common product, and the customized heat sealing device is needed for the four sides sealing.
包装成品的形状为三边封或四边封。 三边封为常规产品，四边封需特殊定制热封器。
Three sides sealing is common product, and the customized heat sealing device is needed for the four sides sealing.
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