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《Surveying and Mapping of Geology and Mineral Resources》 2003-01
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Pondering over to Strengthen Protection and Construction of National Basic Control Points

ZHANG Yonghong(Anhui Technical Institute of Surveying and Mapping of Geology, Hefei, Anhui 230022, China)  
The meaning to protect the mark of national basic control points and the problem in protection and construction were introduced; and design, manufacture, protection and utilization of basic control point mark were probed into.
【CateGory Index】: P205
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