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Compared to the 42-year-old Herrenknecht, CREG is still new to the TBM market. But the Chinese firm is catching up fast, thanks, ironically, in large part to Germany—China's main rival in the boring-machine market. CREG purchased TBM design data from German firms and hired 200 engineers, including some experienced German designers.

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New Delhi: A tunnel boring machine that is so huge that it can cover more than 12 kilometers at a time is manufactured by China, its biggest ever such project, to be exported to India.

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