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US2222609A
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Attachment for securing a stranded conductor to a rail
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Railway rail drilling machine
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Bond for rail joints
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Electric bond for rail joints
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Electric bond for rail joints
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Refrigerating system and apparatus
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Train control system
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System and apparatus for measuring electrical resistance
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Train-control and cab signal system
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Train-control system and apparatus
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Railway traffic controlling system
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Train-control system
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