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《Engineering of Surveying and Mapping》 1997-02
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Design and Precision Analysis of Observation Target

Jiang Hui; Zhao Zhongrong (Construction Engineering Institute of Nanjing, Naijing, 210009)Hehai University, Nanjing, 210098)  
In this paper, using observation try of observation target of various different shapes and colours, the problems related design、shape and colour of observation target with observation accuracy are researched.
【CateGory Index】: P204
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