แล็ปท็อป, การศึกษา, จอภาพ, ขาวดำ, เสมือน, คอมพิวเตอร์, หนังสือ, เรียน, การอบรม, ความรู้, เทคโนโลยี
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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