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Vibrator producing seismic energy - contains heavy reaction wt. movable by hydraulic piston and divided working cylinder
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Cut=off arrangement for artesian well - has shut=off valve in pipe packing which can be directly opened from sample extracting pipe above ground level
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Procedure for seismic surveying
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Protective container for a hydrophone
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METHOD FOR DETECTING SEISMIC DATA
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Submersible body towed by a watercraft
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Cable sealing plug (cable terminating plug)
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METHOD FOR DETERMINING THE LOCATION OF CABLE SECTIONS TOWED BEHIND A SHIP
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Method of monitoring areas, in particular garbage (rubbish) dumps (landfills), dams, dykes or the like
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Chain-shaped arrangement of several borehole probes
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METHOD AND DEVICE FOR DETERMINING THE APPEARANCE OF TRANSFER PROCESSES IN THE GROUND
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Process for forming a tube
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