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DE1964010A1
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Method for radio location from a moving vehicle and device for carrying out the method
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Device for generating seismic signals
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Method and device for the precise location of points
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Device for generating pressure waves
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Time of flight measurement method for geophysical investigations
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PROCEDURE AND EQUIPMENT FOR RADIO LOCATION
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Method and device for the acoustic determination of interfaces
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Measurement of cavities, especially underground caverns
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Seismic reflection measurement method
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Device for the delivery of seismic impulses
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Measuring cable for seismic sea measurements
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Hydrophone for seismic sea measurements
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Measuring cable for seismic sea measurements
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Method to increase the dynamics for recordings of seismic vibrations
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Method for controlling seismic energy sources in geophysical investigations
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Arrangement for digital recording of seismograms
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Method for polarizing a precession magnetometer
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Method and arrangement for determining the sound propagation times in the weathering zone of the ground
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DE1281579B
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Method and circuit arrangement for the precise determination of the frequency of an intermittent oscillation
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DE1232616B
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Holder for magnetic heads
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