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NTPC

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IOCL

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DRDO

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IRCON

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Punj Lloyd

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Tata Consultancy Services

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L&T-ECC

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SIMPLEX

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Alstom

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Patel Engineering

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Satyam Computers

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Tata Tele Services

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Kirloskar Oil

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Power Grid

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NHPC

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HPCL

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HLS ASIA

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RITES

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ABB

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VEDANTA

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WIPRO

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MECON

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ACC

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HCC

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Mahindra & Mahindra

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Tata Motors

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Nokia Siemens

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These are to name some of the important companies. Not all visiting companies are listed