Washmarking
波紋, 波紋面(鋼錠表面缺陷)
??? 情景例句
Eight pounds six.
八磅六。
Yes, we have been interested in new system.
是的，我們對新系統很感興趣。
There is no social problem it is more incumbent upon us to understand than this of the role of custom.
而沒有任何一個社會問題比得上風俗的作用問題更要求我們對它理解。