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US5170937A Concrete railroad stringer or tie 失效
混凝土轨道或领带

Concrete railroad stringer or tie
摘要:
Concrete railroad stringer assembly for securing a railroad track comprising supports imbedded in the stringer and having a bow-shaped part extending above the stringer. The supports either are equipped with an abutment made of synthetic material or are made of ductile material forming itself an abutment for the railroad track. The supports are equipped with or intended to receive securing straps for securing the railroad track on the stringer.
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