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The top visible surface of the keys should be unpolished.
键顶的可视表面应该是无光泽的.
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Check projection directions and visible surface detail.
(检察发射方向和表面细节的可见性. )
Crushing: Paper defect affecting a small area and showing as a visible surface fault.
压痕: 纸面故障,它影响的面积小,但瑕疵显.
Bar code symbol, with no visible surface clean dirt, wrinkles of loss or damage or perforated.
条码标记暗不天利落,无澄辉污垢, 皱褶,残损或穿孔.
英汉双解词典包含4367426条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。