SDAI is the standard data access interface of STEP. It defines a functional interface between an engineering application and one or more collections of data described using EXPRESS.
SDAI是STEP的数据接口规范，它为工程应用与EXPRESS描述的数据模型间定义了一个功能界面。
SDAI is the standard data access interface of STEP. It defines a functional interface between an engineering application and one or more collections of data described using EXPRESS.
SDAI是STEP的数据接口规范，它为工程应用与EXPRESS描述的数据模型间定义了一个功能界面。
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