Lengths of rails assembled into strings, e.g. welded together

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Laying, rebuilding, or taking-up tracks; Tools or machines therefor (E01B27/00, E01B31/00 take precedence) > Transporting, laying, removing, or replacing rails; Moving rails placed on sleepers in the track (E01B29/05 takes precedence; moving or tilting heavy loads in general B65G7/00) > Lengths of rails assembled into strings, e.g. welded together