平滑度：纸张表面的均匀程度。印半色调图片或实地时，需要考虑的纸张特性。
Smoothness: Evenness of paper surface. A paper characteristic requiring consideration when printing solids and half-tones.
平滑度：纸张表面的均匀程度。印半色调图片或实地时，需要考虑的纸张特性。
Smoothness: Evenness of paper surface. A paper characteristic requiring consideration when printing solids and half-tones.
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