凯莱·尼尔森出版社
期刊
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图书
作者:Guo Chunmei
来源:[J].International Journal of Civil Engineering and Environmental Science, 2014, Vol.2 (2), pp.78-86凯莱·尼尔森出版社
摘要:The target object must stay in the permanent position within telescopic field of vision during the long-playing exposure of astronomical photograph; otherwise it may blur the picture.For this reason, the telescope has to track the target objects precisely in a long time. So the f...

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