黑白條紋圍住一枚海螺

One large conch silhouette formed entirely by alternating black and ivory curved bands, optical-art poster with precise line spacing and a gentle central bulge, generous blank margins, no lettering.

一個巨大的海螺輪廓完全由黑白相間的彎曲條帶構成，歐普藝術海報，線條間距精確，中央有柔和的隆起，留出充裕的空白邊距，無文字。