เทคโนโลยี, การเชื่อมต่อ, จุด, จอภาพ, บทคัดย่อ, เนื้อผ้า, เบา
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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