• Cartons to be double wall corrugated, containing three flat layers of liner paper, one of them to be between two layers of flute paper, which must be stuck together well.

    纸箱双壁波纹,挂面长笛文件必须在一起之间其中之一

    youdao

  • Cartons to be double wall corrugated, containing three flat layers of liner paper, one of them to be between two layers of flute paper, which must be stuck together well.

    纸箱双壁波纹,挂面长笛文件必须在一起之间其中之一

    youdao

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