介绍了型号产品附件和专用工具的概念,分析了当前附件和专用工具代号编制方法中的问题,结合型号定型工作的经验和使用部门的意见,提出专用区分代号的编制方法并指出其优点。 The concept of model product attachments and special tools was introduced. Problems in the current annexes and special tool code numbering methods were analyzed. Combined with the model stereotypes work experience and the opinions of the use department, the preparation method of special division code was proposed and its advantages were pointed out.