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E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
E01B3/00—Transverse or longitudinal sleepers; Other means resting directly on the ballastway for supporting rails
E01B3/16—Transverse or longitudinal sleepers; Other means resting directly on the ballastway for supporting rails made from steel
E01B3/26—Transverse or longitudinal sleepers; Other means resting directly on the ballastway for supporting rails made from steel combined with inserts of wood artificial stone or other material
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FR688812D1929-01-241930-01-24Traverses mixtes pour voies de chemins de fer
ExpiredFR688812A
(fr)