Coaxial biprism device for high-precision connection survey

The invention relates to a coaxial biprism device for high-precision contact survey, which is characterized in that a base is fixed on the edge of a vertical shaft, the lower end of a vertical pipe is sleeved with a limiting rod vertically connected with the upper surface of the base, one side of th...

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Bibliographische Detailangaben
Hauptverfasser:	LIU HONGXING, QIAO GUOPING, JIA ZHAOXIANG, SHI YAFEI, LIU XIWEI, ZHAO DANNI, KANG JIAFAN, LI PEILIANG, DONG BAOJUN, WEI YINGTAO, SONG HONGTAO, TANG CHUANYI, HAN PENGXIANG, SU SHIJIE
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS GALLERIES GYROSCOPIC INSTRUMENTS LARGE UNDERGROUND CHAMBERS MEASURING MEASURING DISTANCES, LEVELS OR BEARINGS MINING NAVIGATION OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHOTOGRAMMETRY OR VIDEOGRAMMETRY PHYSICS SHAFTS SURVEYING TESTING TUNNELS
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