2014年(381)
分类: 信息化
2014-06-06 18:13:28
A free sealing , which includes a bag body, crevasse and feeding unit.The bag body to form a first for space.Connect to space for breach.Feeding unit has a salient , it is set in the side of the break, and separate the crevasse, to form the second and third for space, for space and the second for space connected to break, and the third for space is not connected to the crevasse.When feeding unit of salient along the third for space can be folded in half, will limit the first for the space by the second, let the external space connected to avoid closure pocket.
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