彎月形透鏡

Simplified: 弯月形透镜

wānyuèxíngtòujìng ㄨㄢ ㄩㄝˋ ㄒㄧㄥˊ ㄊㄡˋ ㄐㄧㄥˋ

    • meniscus lens

Character by character

Sources