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1, look at the positive and negative: the positive and negative here is not necessarily to set a positive or negative pr...
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Composite packaging is two or more than two kinds of materials, after one or more dry composite process and combined tog...
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With the rapid development of economy and the continuous improvement of people's level of clothing, food, housing an...
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Where are OPP plastic bags used? When touching OPP plastic bags, we will feel a variety of colors, such as some bags pri...
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Plastic bags are widely used because of their advantages of light, durable, waterproof, insulation and low cost, but the...
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