มือ, มาร์ทโฟน, บาร์โค้ด, QR, โทรศัพท์มือถือ, พีดีเอ, จับมือ, ถ่ายภาพ, การสแกน, ตอบสนองอย่างรวดเร็ว, ข้อมูล
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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