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
E01B3/28—Transverse or longitudinal sleepers; Other means resting directly on the ballastway for supporting rails made from concrete or from natural or artificial stone
E01B3/36—Composite sleepers
E—FIXED CONSTRUCTIONS
E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
E01B9/00—Fastening rails on sleepers, or the like
E01B9/02—Fastening rails, tie-plates, or chairs directly on sleepers or foundations; Means therefor
E01B9/04—Fastening on wooden or concrete sleepers or on masonry without clamp members
E01B9/20—Fastening on wooden or concrete sleepers or on masonry without clamp members by keys
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Machines For Laying And Maintaining Railways
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