出售高级厚纸箱、气柱袋、气泡膜、包装货单、防爆气垫

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不明白这个三层是怎么样的三层

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作者: Hanbing Liu

不明白这个三层是怎么样的三层

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纸箱厚度，三层纸板。两层纸板中间夹着一层泼浪

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