分类抑郁症并不总是一件容易的事。

Classifying depression is not always an easy thing to do.

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确定零件组的参考模式是零件分类系统的关键问题。

To define the part cluster reference patterns is the key in part classification system.

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确定零件组的参考模式是零件分类系统的关键问题。

To define the part cluster reference patterns is the key in part classification system.

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