Based on predecessors'work and deep understanding about the definition and characteristics of the digital museum, it brings up a model of the 21st digital museum.
本文从数字博物馆的定义和特征入手，提出21世纪“网络数字科普服务系统”的数字博物馆模型；
It has been developed for the improvement of the digital seismic station, and is an alternate production of the model JD-2 deep well seismometer.
它是为井下地震台的数字化改造而研制的，是JD - 2型地震仪的替代产品。
It has been developed for the improvement of the digital seismic station, and is an alternate production of the model JD-2 deep well seismometer.
它是为井下地震台的数字化改造而研制的，是JD - 2型地震仪的替代产品。
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