OPTICAL BY ROTATING LASER BEAM WITH ONE OR MORE REMOTE DETECTORS. LEVELS. INSTRUMENTS AND APPARATUS FOR GEODESY TOPOGRAPHY SURVEYING LEVELING PHOTOGRAMMETRY HYDROGRAPHY OCEANOGRAPHY HYDROLOGY METEOROLOGY OR GEOPHYSICS (EXCEPT COMPASS|| BLACK JACK|| V1 26
OPTICAL BY ROTATING LASER BEAM WITH ONE OR MORE REMOTE DETECTORS. LEVELS. INSTRUMENTS AND APPARATUS FOR GEODESY TOPOGRAPHY SURVEYING LEVELING PHOTOGRAMMETRY HYDROGRAPHY OCEANOGRAPHY HYDROLOGY METEOROLOGY OR GEOPHYSICS (EXCEPT COMPASS|| BLACK JACK|| V1 26