零件为首件，中南在首件报价技术评审和订单评审时对图纸和订单要求的材料识

零件为首件，中南在首件报价技术评审和订单评审时对图纸和订单要求的材料识别有误，未按要求使用P750材料，而错误地使用了SCF-19 MAX。同时技术人员编制的检验气泡图未将图纸上的材料要求设为一个检测点，故后续检验员和资料员未能核对出材料误用，导致逃逸。

The part is the first piece, and Zhongnan mistakenly identified the materials required by the drawings and orders during the technical review of the first piece quotation and order review. They did not use P750 materials as required and mistakenly used SCF-19 MAX. At the same time, the inspection bubble chart prepared by the technical personnel did not set the material requirements on the drawing as a detection point, so the subsequent inspectors and documenters failed to verify the material misuse, resulting in escape.

The parts are the first parts. In the technical review and order review of the first part quotation, Zhongnan incorrectly identified the materials required by the drawings and orders, and used SCF-19 MAX instead of P750 materials as required. At the same time, the inspection bubble diagram compiled by technicians did not set the material requirements on the drawing as a inspection point, so the subsequent inspectors and librarians failed to check the misuse of materials, leading to escape.