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凹形曲线
meaning in English
concave curve
Related Words
凹
椭圆凹
地槽凹
凹痕打凹
窝凹
成凹
球凹
凹坡
凹损
凹出
凹形平板龙骨
凹形器皿
凹形盛器
凹形剩余牙槽嵴
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