National first and second class leveling regulations free of charge
National first and second class leveling regulations free of charge, Total:4 items.
The international standard classification for "National first and second class leveling regulations free of charge" includes: Geology. Meteorology. Hydrology , Astronomy. Geodesy. Geography .
The Chinese standard classification for "National first and second class leveling regulations free of charge" includes: Geotectonic Mapping and Marine Mapping .
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
- GB 12898-1991 Specifications for the third and fourth order leveling
- GB 12897-1991 Specifications for the first and second order leveling
- GB/T 12898-2009 Specifications for the third and fourth order leveling
- GB/T 12897-2006 Specifications for the first and second order leveling
