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Earth sciences
containing
凹
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Chinese
English
凹
入的
female
凹
形的
female
凹
槽
troughs
凹
凸
镜
convex mirror
双晶面
凹
入棱
twin plane re-entrant edge
双面
凹
的
double concave
线性
凹
包络
linear concave envelope
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