2) 首先在软件中绘制一个十字叉的圆形居面页中间（十字叉要与图纸中心重

2) First, draw a cross-shaped circle in the middle of the page in the software (the cross-shaped cross should coincide with the center of the drawing), and then press the laser processing start button twice to mark, so that the pre-drawn graphics are clearly engraved on the metal block On the board, as shown in Figure 2-3.

2) First draw a cross in the software in the middle of the circular face page (the cross to be re-matched with the center of the drawing), and then press two laser processing start keys to mark, so that the pre-drawn graphics are clearly engraved on the metal bezel, as shown in Figure 2-3.

2) First, draw the middle of a cross's circular residential page in the software (the cross should coincide with the center of the drawing), and then press the laser processing start key twice to mark, so that the pre drawn figure can be clearly engraved on the metal baffle, as shown in Fig. 2-3.<BR>