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ES131526A1
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A procedure, with the corresponding device, to uninterrupte the railroad tracks of your ballast, clean it and lay the tracks on clean ballast.
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ES123310A1
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A procedure with the corresponding apparatus, for the continuous purification of the ballast of the railway tracks.
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ES123210A1
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A system of continuous purification of the ballast of the railways.
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ES110805A1
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A procedure with the corresponding apparatus system for the placement and lifting of railway tracks.
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ES110451A1
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Procedure and devices for the leveling of the railways.
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CA326871A
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Railway ballast cleaning system
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CA489168A
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Sighting device for the levelling of railway tracks
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CA499814A
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Ballast dredging and treating machine and accessories for railroad work
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