DBS2T
The photo shows a complete supply of the DBS280B seismograph, consisting of two cable reels with seismic cables + a cable reel for the trigger with the geophones 24 accessory cable, the notebook with the DBS280E (no batteries required) metric wheel
DOLANG-GEOPHYSICAL
Manufacturing SEISMOGRAPHS since 1988
The First Virtual Instrument on 1984 with Zenith
