Taivo A Taiwan Mandarin dictionary

螺旋曲面

luóxuánqūmiàn

ㄌㄨㄛˊ ㄒㄩㄢˊ ㄑㄩ ㄇㄧㄢˋ

  1. 1spiral surface

Keep 螺旋曲面 and it comes back until you know it.

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