PRAKLA-SEISMOS

AIRCRAFT AND MARINE NAVIGATION INSTRUMENTS-NAMELY, NAVIGATION COMPUTERS, NAVIGATION CONTROL INDICATORS AND NAVIGATION TRANSMITTERS; SEISMIC RECORDING, AMPLIFYING AND MEASURING INSTRUMENTS-NAMELY, ELECTRONIC SEISMIC RECORDERS, SEISMIC OSCILLOGRAPHS, SEISMOS MAGNETIC TAPE RECORDERS FOR RECORDING SEISMIC MEASUREMENTS, SEISMIC AMPLIFIERS, MAGNETOMETERS, ELECTRIC TERRESTRIAL FIELD METERS, TRANSMIT CONTROLLERS FOR SEISMIC MEASUREMENTS, MAGNETIC CORRELATORS FOR SEISMIC MEASUREMENTS, ELECTRO-HYDRAULIC VIBRATORS FOR SEISMIC MEASUREMENTS, MEASURING CABLES AND STREAMERS FOR MARINE SURVEYS, SEISMOGRAPHS, HYDROPHONES, WATER BREAK AMPLIFIERS FOR MARINE SURVEYS, DIGITAL PROFILOGRAPHS AND PLOTTERS, DIGITAL TAPE RECORDERS, SEISMIC SIGNAL GENERATORS, BOREHOLE, PROBES, SONDES AND GEOPHONES