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  DAC Limited

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  DAC Limited manufactures communications equipment for rail, including trackside telephones and handsets for passenger information systems.

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  Daktronics

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  Reliable and rugged railway station displays from Daktronics assist passengers with easy-to-find arrival and departure information.

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  DDAP-RAX

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  DDAP-RAX specialises in the manufacturing of high-quality axles for rolling stock and other rail vehicles.

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  Dellner

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  Dellner specialises in couplers and train connection systems, offering innovative, reliable, and safe solutions for the industry.

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  Dellner Glass Solutions Ltd

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  Dellner Glass Solutions' product range is suited to many different industries, including multi glass solutions for the rail sector.

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  Diab Group

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  Diab’s core materials are used in industries including marine, aerospace and transport, making them more competitive and sustainable.

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  Discom

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  Discom has a key role in providing exhaust equipment for diesel aggregates in commuter trains (DMU) and diesel driven locomotives.

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  DSRailTech a.s.

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  DSRailTech is a company of highly skilled and experienced professionals specialising in diagnostics & safety systems to the rail sector.

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  Dual Inventive

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  Dual Inventive develops and produces innovative technology products specialising in IoT, improving railway efficiency.

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  Duos Technologies, Inc.

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  DuosTech provides intelligent solutions for remote automated railcar inspection, undercarriage examination, pantograph inspection and more.