เกลียว, กระแสน้ำวน, fractals, คณิตศาสตร์, บทคัดย่อ, ศิลปะ, มีสีรุ้ง, วอลล์เปเปอร์, ภูมิหลัง, แบบแผน, ออกแบบ
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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