which fluid escapes from the generator in a pulsating manner, e.g. for generating bursts

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Seismology; Seismic or acoustic prospecting or detecting > Generating seismic energy > using fluidic driving means, e.g. highly pressurised fluids; (G01V1/104 takes precedence) > which fluid escapes from the generator in a pulsating manner, e.g. for generating bursts