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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
E01B3/44—Transverse or longitudinal sleepers; Other means resting directly on the ballastway for supporting rails made from other materials only if the material is essential
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CH264533D1946-12-041947-10-27Procedimento per la fabbricazione di traverse per rotaie.
CH264533A
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