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Ballastless track system
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Patent number 9,758,932
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Issue date Sep 12, 2017
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Railway Engineering Research Institute of China Academy of Railway Sciences
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Chunfang Lu
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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3687366
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Patent number 3,687,366
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Issue date Aug 29, 1972
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES