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Concrete railroad rail fastener
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Lubrication-free roller slide plate for railroad turnout
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Elastic pad for concrete track turnout
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Precast slab track system and method constructing the same
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Elastic clip for railroad rail fixing and this establishment method
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Expansion joint for bridge tracks and this construction technique
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Electricity heating installation for railroad turnout and this establishment method
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The iron pipe interlocking plant structure for railroad turnout and interlocking method
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Railroad turnout rail safety device and rail anti-uplifting method which used this
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Concrete railroad rail fastener
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Railroad rail fastener and fastening method for concrete beds
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Crossover turnout tie arrangement, the rail fixed structure and method
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