2014年(381)
分类: 信息化
2014-06-10 18:23:51
to design a bag or backpack or bag waterproof structure, its structure mainly includes cloth surface and bonding of plastic layer, the plastic bag and cloth material bag, it is a plastic package edge coating on plastic layer edges on both sides, and the high frequency welding, and cloth cloth material and coated on the surface edge and welding with plastic bags and plastic layer edge, again with the needle car cloth material package edge and the coated cloth material surface and coated with plastic bags and plastic layer suture fixation and made from the edge of the bag or backpack or bag. design more close to the life.
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