บทคัดย่อ, เรขาคณิตของ, เนื้อผ้า, พื้นหลัง, แบบแผน, เบา, จิตรกรรม, เรืองแสง, เส้น, จุด
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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