concave down

英 美
  • adj. 下凹的

concave down的相关资料：

临近单词

concaveup concave concave and raised surface concave and convex operator concave rolling disk colter concave programming problem concave planing attachments concave diffraction grating concave-convex separation concave slide shoe for ball concave interlocking cutter concave-up concave-down
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