
OPTICS AND OPTICAL INSTRUMENTS - ANCILLARY DEVICES FOR GEODETIC INSTRUMENTS - PART 1: INVAR LEVELLING STAFFS (ISO 12858-1:2014)
出版:German Institute for Standardisation (Deutsches Institut für Normung)

專家解讀視頻
Describes the most important requirements of Invar levelling staffs used in geodesy and industry for precise measurement of heights in combination with either an optical-mechanical level equipped with a parallel plate micrometre, or a digital level of comparable precision.