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Screw conveyor device for a road-driving device working underground
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METHOD AND DEVICE FOR THE CONTROLLED UNDERGROUND DRIVING OF TUBES IN THE UNMATCHABLE DIAMETER AREA
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Boring head for underground pipe driving working according to the soil-borrowing principle
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Apparatus for underground pipe driving in the range of inaccessible pipe diameters
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Driving-pipe set for underground pipe driving
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DEVICE FOR WORKING UNDERGROUND PRESSING PIPES UNDER THE SOIL PRINCIPLE
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Device for the underground advancing of pipes
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Arrangement for the controllable advancing of pipes for producing an underground pipe heading
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Process and device for underground pipe advancing
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A device for the controllable pressing-forward of pipes for underground pipe advancing
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