tower computer mouse crt monitor lcd screen keyboard hardware desktop personal tube ray cathode qwerty Pc clip art 技術 塔式電腦滑鼠 Crt 顯示器液晶螢幕鍵盤硬體桌面個人管射線陰極 qwerty 鍵盤
only the lines of a common CRT monitor for line art compositions or a base for new drawing. 線條藝術 顯示器 電腦 CRT 顯示器中線條藝術