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E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
E01C9/00—Special pavings; Pavings for special parts of roads or airfields
E01C9/001—Paving elements formed in situ; Permanent shutterings therefor ; Inlays or reinforcements which divide the cast material in a great number of individual units
Assemblage par emboitement de deux profiles a section droite en z, notamment pour la realisation d'une panne, d'une lisse ou d'un support de plancher.