1、图1为轻微摩擦痕，冬季穿着厚重，调试工上下车过程剐蹭造成；2、图二

1. Picture 1 is a slight friction mark, which is caused by heavy wear in winter, which was caused by the commissioning worker getting on and off the car; <br>2. Picture 2 is a hard object scratch caused <br><br>by the subsequent on-board operator's tool kit not being placed as required; through on-site physical analysis, There is a lot of dust around the scratch, and there are traces of scratches. It is analyzed that it is caused by the repair workers after offline; <br><br>1. The scratches here should be within the standard receiving range, which is caused by bumps in the parts distribution process, and the sub-assembly process is not found in time ; <br>2, before starting the process of testing the vehicle with the tire caused by stones hitting; <br>design defects, process bolt matter causes rotation of the pad flat minor scratches, scratches only varnish, may be wiped with alcohol; <br><br>door mechanical hand bottom bracket protective glue pier Caused by wear; <br><br>1. The incoming parts are scratched, and the line is assembled with a film; <br>2. The follow-up commissioning and repairing function line removal process causes scratches;

1. Figure 1 shows slight friction marks, which are worn heavily in winter and caused by scraping when the commissioning workers get on and off the train;<br>2. Figure 2 shows the scratch of hard objects, which is caused by the failure to place the toolkits of subsequent boarding operators as required;<br>According to the on-site physical analysis, there is a lot of dust around the scratch, and there are scratches, which is analyzed to be caused by the repair workers after off-line;<br>1. The scratch here should be within the standard receiving range, which is caused by collision during parts distribution and not found in time during sub assembly;<br>2. During the test run, the stones brought by the front vehicle tire hit;<br>Design defects: slight scratches are caused by the rotation of the flat pad during the tightening process of the bolt, and only scratches appear in the gloss paint, which can be wiped with alcohol;<br>The protective rubber pier of the support at the bottom of the door manipulator is worn;<br>1. Parts and components are scratched and coated on the line for assembly;<br>2. Scratches caused by subsequent commissioning and repair function line removal;

1. Figure 1 shows the slight friction marks, which are worn heavily in winter, and are caused by the commissioning workers' scratches during getting on and off the bus. 2. The second picture shows the scratch of hard objects, which is caused by the failure to place the tool kit for the subsequent boarding operators as required; On-the-spot physical analysis shows that there is a lot of dust around the scratch, and there are scratches, which are caused by the rework operators after off-line. 1. The scratch here should be within the standard acceptance range, which is caused by bumping in the distribution process of parts and components, and it was not found in time in the packaging process; 2. The stone brought up by the front tire during the test run was hit; Design defect, slight scratch caused by the rotation of flat pad during bolt tightening, only scratch of varnish, which can be wiped with alcohol; Wear of the protective rubber pier of the bottom bracket of the manipulator; 1. The incoming parts of parts are scratched, and the online assembly is coated; 2. Scratches caused by the dismantling process of subsequent debugging and repair function lines;