Flatness calibration device for surveying and mapping engineering

The invention relates to the field of surveying and mapping engineering, in particular to a flatness calibration device for surveying and mapping engineering, which comprises a U-shaped plate, a laser pen and more than one blocking rod, the blocking rods are vertically arranged in the U-shaped plate...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	NIE GUANGBO, WANG YULEI, LI QIANG
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	MEASURING MEASURING ANGLES MEASURING AREAS MEASURING IRREGULARITIES OF SURFACES OR CONTOURS MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS PHYSICS TESTING
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