INSTRUMENTS AND APPLIANCES USED IN GEODESY TOPOGRAPHY HYDROGRAPHY OCEANOGRAPHY HYDROLOGY METEOROLOGY OR GEOPHYSICS (EXCL. COMPASSES RANGEFINDERS THEODOLITES TACHYMETERS TACHEOMETERS LEVELS AND PHOTOGRAMMETRICAL SURVEYING INSTRUMENTS AND APPLIANCES)
INSTRUMENTS AND APPLIANCES USED IN GEODESY TOPOGRAPHY HYDROGRAPHY OCEANOGRAPHY HYDROLOGY METEOROLOGY OR GEOPHYSICS (EXCL. COMPASSES RANGEFINDERS THEODOLITES TACHYMETERS TACHEOMETERS LEVELS AND PHOTOGRAMMETRICAL SURVEYING INSTRUMENTS AND APPLIANCES)