A Data (DICOMData) object can be specialized to become one of four types of object: Patient, study, series, or image.

一个Data对象(DICOMData)可以特殊化为以下四种对象中的一种：patient、study、series或image。

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Marketing Psychology Study Series (c) Yi-yin-yin-color: What is the purpose of learning?

营销心理学研究系列（三）贤贤易色：学问的目的是什么？

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Marketing Psychology Study Series (c) Yi-yin-yin-color: What is the purpose of learning?

营销心理学研究系列（三）贤贤易色：学问的目的是什么？

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