PDF(171 KB)
SURVEYING DISTRIBUTION OF GPS CONTROL NETWORK FOR EXTRA-LONG TUNNEL AND ITS ACCURACY
ZHANG Xiang-duo
Journal of Railway Engineering Society ›› 2001, Vol. 18 ›› Issue (4) : 85-88.
PDF(171 KB)
PDF(171 KB)
SURVEYING DISTRIBUTION OF GPS CONTROL NETWORK FOR EXTRA-LONG TUNNEL AND ITS ACCURACY
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