convex head

• 凸形封头

convex head的用法和样例：

例句

1. When a tiny servomotor compresses a circular periphery seal that acts like an iris diaphragm, the shape of the membrane grows convex, modifying the fluidic lens's focal length.
   小型伺服马达压下类似虹膜开口的圆圈形封垫时，薄膜会变成凸形，进而改变液体透镜的焦距。