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凹线
meaning in Chinese
chamfer
concave line
concave upward
groove
Related Words
窝凹
成凹
凹坡
凹出
凹缝
凹光栅
凹创
凹切
凹域
凹坑
凹陷胸
凹陷压印
凹线标号
凹线不稳性
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