เลขฐานสอง, แปลง, หัว, คน, หน้าจอ, แสดง, เกียร์, งาน, คณะกรรมการ, ตัวนำ, โมฆะ
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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