Stiffness: It is a measure of the bending strength of paper and board.

挺度：挺度是衡量纸和纸板耐弯曲的强度性能。

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Stiffness: It is a measure of the bending strength of paper and board.

挺度：挺度是衡量纸和纸板耐弯曲的强度性能。

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