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CHADWICK DUNCAN L
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CHADWICK DUNCAN L
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Application filed by CHADWICK DUNCAN LfiledCriticalCHADWICK DUNCAN L
Publication of GB201015513D0publicationCriticalpatent/GB201015513D0/en
Publication of GB2473729ApublicationCriticalpatent/GB2473729A/en
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