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METHOD OF COLLISIONFREE CLEANING RAILWAY SUBGRADE BALLAST BY MEANS OF A MACHINE AT LOCATIONS WHERE INSPECTION CHAMBERS ARE PRESENT WITHIN THE INTERTRACK SPACE AND HAVE THEIR WALL WITHIN THE LIMITING OUTLINE OF CLEANING MACHINE AS WELL AS CONSTRUCTION OF INSPECTION CHAMBER
METHOD OF COLLISIONFREE CLEANING RAILWAY SUBGRADE BALLAST BY MEANS OF A MACHINE AT LOCATIONS WHERE INSPECTION CHAMBERS ARE PRESENT WITHIN THE INTERTRACK SPACE AND HAVE THEIR WALL WITHIN THE LIMITING OUTLINE OF CLEANING MACHINE AS WELL AS CONSTRUCTION OF INSPECTION CHAMBER