AFNOR NF EN 13230-4
French Language - RAILWAY APPLICATIONS - TRACK - CONCRETE SLEEPERS AND BEARERS - PART 4 : PRESTRESSED BEARERS FOR SWITCHES AND CROSSINGS
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AFNOR NF EN 13230-4
French Language - RAILWAY APPLICATIONS - TRACK - CONCRETE SLEEPERS AND BEARERS - PART 4 : PRESTRESSED BEARERS FOR SWITCHES AND CROSSINGS
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