DK10678C
(en)
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Drill rod with inclined bore for steel.
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AT41211B
(en)
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Dowel sleeve for concrete sleepers u. like
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AT27150B
(en)
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Rock drilling machine.
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AT41041B
(en)
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Concrete iron sleeper.
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DK6635C
(en)
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Hand drill.
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DK10945C
(en)
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Liner for drilled wells.
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AT26006B
(en)
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Rock drilling machine.
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ES34888A1
(en)
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Rock drill improvements.
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AT46526B
(en)
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Rock impact drilling machine.
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CH48054A
(en)
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Rock drilling machine
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DK7535C
(en)
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Tool steel with self-hardening inserts.
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ES43230A1
(en)
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New drilling apparatus for the construction of artisan wells.
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FR407947A
(en)
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Auger bit
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AT23730B
(en)
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Sleeper drilling device.
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CH43511A
(en)
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Twist drill
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AT27595B
(en)
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Rock drilling machine.
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DK12370C
(en)
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Railway carriage with reinforced longitudinal girders.
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ES38476A1
(en)
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Improvements in rock drills and other friction tools.
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DK6704C
(en)
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Combined Rod and Bridle Bits.
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DK7033C
(en)
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Level rod.
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DK6871C
(en)
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Sinking machine with loose scale.
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CA87738A
(en)
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Rock drilling engine
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AT44116B
(en)
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Concrete sleeper.
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DK10744C
(en)
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Rail shock connection.
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CH46625A
(en)
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Chisel hammer
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