tower computer mouse crt monitor lcd screen keyboard hardware desktop personal tube ray cathode qwerty Pc clip art 技术 塔式计算机鼠标 Crt 显示器液晶屏幕键盘硬件桌面个人管射线阴极 qwerty 键盘
only the lines of a common CRT monitor for line art compositions or a base for new drawing. 线条艺术 显示器 计算机 CRT 显示器中线条艺术