WLAN, เว็บ, เครือข่าย, โอน, ทั่วโลก, คลื่น, วงกลม, หน้าจอ, ส่ง, โลก, อินเทอร์เน็ต
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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