การสื่อสารโทรคมนาคม, ทำงานที่บ้าน, ห้องนั่งเล่น, งานแลนซ์, ทำงานจากระยะไกล
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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