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ACCIONA S.A.

Multinational sustainable infrastructure and renewable energy conglomerate delivering high-speed rail lines, mechanized transit tunneling, light rail networks, major railway bridges, and station interchange complexes across Europe, North America, Latin America, and Australia.

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Herrenknecht AG

World-leading German technology and manufacturing specialist in mechanized tunneling systems, engineering custom tunnel boring machines (TBMs), underground logistics, and shaft sinking equipment for high-speed rail, transit tunnels, and base mountain crossings.

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Kajima Corporation

Premier Japanese super-general contractor, civil engineering powerhouse, and global rail infrastructure builder renowned for high-speed Shinkansen corridors, complex mechanized shield tunneling, deep underground stations, and autonomous heavy construction technologies.

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