发明授权
US5628454A Foot support modification for railroad rails 失效
铁路轨道脚支撑修改

Foot support modification for railroad rails
摘要:
A sole, ribbed or slide chair plate for a foot of a railroad rail provided with two spaced flat bearing surfaces between which is a concave surface allowing for non tipping of the rail when in place if the bottom of the rail has a convex surface and a shim fitting on top of the plate having a top surface composed of two spaced flat bearing surfaces between which is a concave surface.
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