图4.2为原子力显微镜表征图，左侧为经原子力显微镜检测之后模拟三维图，

Figure 4.2 is the atomic force microscope characterization diagram, the left side is the simulated three-dimensional image after the atomic force microscope inspection, and the right side is the line mark contour diagram, used to qualitatively characterize the degree of suede twist. a, b, and c are the test samples in three periods before, after, and after smoothing with copper-iron smoothing agent.

图4.2为原子力显微镜表征图，左侧为经原子力显微镜检测之后模拟三维图，右侧为线痕轮廓图，用于定性表征绒面曲折程度。a、b、c分别是经铜铁圆滑剂圆滑之后前中后三个时期检测样品。

Fig. 4.2 is the characterization diagram of AFM, the left side is the simulated three-dimensional diagram after AFM detection, and the right side is the line trace outline diagram, which is used to qualitatively characterize the degree of pile twist. a. B and C are the samples tested in the first, middle and last three periods after the copper iron smooth agent.<BR>