แปลง, แผงวงจร, แตะ, นิ้ว, มือ, ติดต่อ, การแปลง, ดิจิตอล, วิศวกรรม, เทคโนโลยี, การสื่อสาร
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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