DLL technology is an effective method to realize data collection.

DLL技术是实现数据采集的有效方法。

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These technology problems include: the collection and input of geographic data;

这些技术问题包括：地理数据的采集和录入；

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These technology problems include: the collection and input of geographic data;

这些技术问题包括：地理数据的采集和录入；

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