E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
E01B31/00—Working rails, sleepers, baseplates, or the like, in or on the line; Machines, tools, or auxiliary devices specially designed therefor
E01B31/02—Working rail or other metal track components on the spot
E01B31/18—Reconditioning or repairing worn or damaged parts on the spot, e.g. applying inlays, building-up rails by welding; Heating or cooling of parts on the spot, e.g. for reducing joint gaps, for hardening rails
Four electrique a haute temperature dont les resistances sont des tubes conducteurs verticaux creux chauffants maintenus en place par des tubes epingles faisant office d'etriers, dans lesquels circule de l'air frais