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。
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 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 between different systems.
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