ELECTRONIC EQUIPMENT FOR USE IN GEOPHYSICS, NAMELY: [ ANALOG AND DIGITAL SONOBOUYS, ] HYDROPHONES, [ ANALOG AND DIGITAL RECEIVERS, TRANSCEIVERS, PREAMPLIFIERS, ] POWER SUPPLIES, DIGITAL TRANSMITTERS, DIGITAL RECEIVERS, REMOTE DIGITIZERS, DIGITAL FIELD RECORDERS, [ SEISMIC GUN DEPTH CALIBRATORS, WELL LOG RECORDERS, SEISMIC GUN CONTROLLERS AND MONITORS, ] MICROSEISMIC REMOTE RELAY STATIONS, MICROSEISMIC RECORDERS, [ SEISMIC GUN FIRING SENSORS, ] BAND PASS FILTERS [ , SEISMIC GUN FIRING APPARATUS, VSP (VERTICAL SEISMIC PROFILING) GUN TRANSCEIVERS, VSP (VERTICLE SEISMIC PROFILING) REMOTE GUN FIRING UNITS AND TELEMETRY CONTROL COMPUTERS ]

'analog':8,13 'apparatus':58 'band':52 'calibr':33 'comput':76 'control':39,75 'depth':32 'digit':10,15,21,23,26,27 'electron':1 'equip':2 'field':28 'filter':54 'fire':50,57,71 'geophys':6 'gun':31,38,49,56,63,70 'hydrophon':12 'log':35 'microseism':42,46 'monitor':41 'name':7 'pass':53 'power':19 'preamplifi':18 'profil':62,68 'receiv':16,24 'record':29,36,47 'relay':44 'remot':25,43,69 'seismic':30,37,48,55,61,67 'sensor':51 'sonobouy':11 'station':45 'suppli':20 'telemetri':74 'transceiv':17,64 'transmitt':22 'unit':72 'use':4 'vertic':60 'verticl':66 'vsp':59,65 'well':34

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