Sizing agents are used for improving water-resistance in middle to high end paper and in packaging board.

施胶剂广泛用于提升中高端纸和纸板的抗水性能。

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At the end, paper summarizes the work and makes a prospect.

最后，本文对课题的工作进行了总结和展望。

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At the end, paper summarizes the work and makes a prospect.

最后，本文对课题的工作进行了总结和展望。

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