1. mechanical design (Mechanical)-the mouse wheel roller is as below. When users move the mouse with the mouse on the mouse pad (Mouse pad) or the desktop to make the lower roller rotates and allows the mouse's internal rotation axis. It will send a signal to coordinate position of the mouse pointer (Mouse Pointer) to the desired location on the screen. To select a different transmission on the screen. Do this by pressing the left or right (Click) or twice (Double Click) the function of this control with the mouse, the program, called the Mouse Driver.
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