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Priority to JP1980129170UpriorityCriticalpatent/JPS6343011Y2/ja
Publication of JPS5753851UpublicationCriticalpatent/JPS5753851U/ja
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Publication of JPS6343011Y2publicationCriticalpatent/JPS6343011Y2/ja
A concrete sleeper block comprising a rail support insert plate of elastomeric material,a method of manufacture the sleeper block and a rail insert plate for carrying out the method