SDAI is the standard data access interface adopted by STEP, it aims to provide a uniform data access interface standard between different systems.
SDAI是STEP采用的标准数据访问接口，是针对不同的数据存贮技术而提供的统一的数据存取接口标准。
SDAI is the standard data access interface adopted by STEP, It aims to provide a uniform data access interface standard be-tween different systems.
SDAI是STEP采用的标准数据存取接口，是针对不同的数据存贮技术而提供的统一的数据存取接口标准。
The paper mostly includes the research development of STEP-NC information picking up system based on SDAI, the system is prepared for developing the STEP-NC system.
本文主要研究和开发了基于SDAI的STEP-NC信息提取系统，为开发STEP-NC数控系统提供了前提和基础。
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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