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层底凹痕
meaning in Chinese
concave hyporelief
Related Words
凹痕
凹凹
凹
凹痕打凹
放电凹痕
戳痕
油痕
树脂痕
锯痕
绿痕
层的直积
层底
层底凸痕
层底线状印痕
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