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the following ‘reference case’ for the slope to be considered is suggested: maintain the speed of 80 km/h on a slope of 21 ‰ constant gradient over a distance of 46 km.
følgende situation foreslås som »referencetilfælde« for fald på sporet: opretholdelse af en hastighed på 80 km/h ved et konstant fald på 21 ‰ over 46 km.