A paper characteristic requiring consideration when printing solids and half-tones.
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。
In this paPer, nonlinear dynamic characteristic and transient performance of thrust bearings are studied.
本文主要研究了推力轴承的非线性动特性和瞬态性能。
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