คน, ฝูงชน, ห่างไกล, งาน, สำนักงาน, สำนักงานที่บ้าน, คอมพิวเตอร์, ห้อง, ช่องว่าง, การสื่อสาร
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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