E01B9/02
Fastening rails, tie-plates, or chairs directly on sleepers or foundations; Means therefor
E01B9/02
Fastening rails, tie-plates, or chairs directly on sleepers or foundations; Means therefor
E01B9/28
Fastening on wooden or concrete sleepers or on masonry with clamp members
E01B9/28
Fastening on wooden or concrete sleepers or on masonry with clamp members