中文摘要：

针对大型数控机床主要零件切削数据库,提出了基于STEP-NC的实例编码方案,给出了编码属性和编码顺序,并且通过实例编码示例,验证了基于STEP-NC的大型数控机床主要零件切削数据库实例编码的可行性。

英文摘要：

Aimed at the large NC machine main parts cutting database, the example coding scheme based on STEP-NC was proposed. The encoding attributes and encoding sequence were presented. And through the example code cases, the feasibility of the STEP-NC-based example coding of large NC machine main parts cutting database was verified.