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DE4111845A1
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Device for the longitudinal cutting of tubes, in particular plastic sample tubes
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SOIL SAMPLE PROBE FOR RAMM CORE SOUNDING
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DE3148708A1
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Method for controlling a pneumatically driven annular striker
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DE3120874A1
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Device which is slipped onto or put onto tubes or piles for driving or extracting them into or from the earth
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BE886823A
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Device for the introduction in the ground of rod-shaped heat exchangers
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Closed cycle heat pump - incorporates mechanical power unit using pressure of evaporated refrigerating medium
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Heating road surface in cold weather - involves sunken heat exchangers using earth heat to warm fluid in pipes
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Inserting tube assembled heat exchanger rods in ground - involves expelling high pressure water jet from rod tip
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Ground heat recovery method - uses bar-type heat exchangers inserted in diverging radiating pattern
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Ram-type test boring system - with leading point comprising concentric disc with diameters decreasing towards end
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DEVICE FOR PUTTING ROD-SHAPED HEAT EXCHANGERS INTO THE GROUND
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DE2947837A1
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Underground heat extraction tube installation - uses pile driver tube to form hole matching size of heat extraction tube with pointed tip
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DE2923262A1
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Pile core sounding ground probe extractor - has piston integrated with lock which detachably bolts it to tube tip
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