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Science & Technology Review  2014, Vol. 32 Issue (31): 41-45    DOI: 10.3981/j.issn.1000-7857.2014.31.004
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An External Railway Geometric Parameter Measurement System Based on GPS
FU Qinyi, LIU Zhiping, LI Kunwu
School of Traffic & Transportation Engineering, Central South University, Changsha 410083, China

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