ผู้พูด, หน้าจอ, เพลง, ลำโพง, หูฟัง, เวิร์กสเตชัน, สีดำ, จอภาพ, เทคโนโลยี, ออกแบบ
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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