
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
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