在他的地图上,地球表面呈圆凸状。
一种背投屏,它把双面凸状透镜膜作光色散元件。
Rear projection screens use lenticular lens films as light dispersing components.
止挡机构还可构形成各自 互锁的成对的环状部和凸状部。
The catch mechanisms may further be configured as respective interlockable pairs of loops and bosses.
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