LIU Jia - jun. Wear principles and resistance of materials. Beijing: Tsinghua University Press, 1993.

刘家浚. 材料磨损原理及其耐磨性. 北京: 清华大学出版社, 1993.

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In printing, it is the resistance of materials such ad rubber blanket, paper, etc, to indentation.

在印刷方面是指胶布 、 纸张等物料对压凹的抗力.

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