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Bharat Heavy Electricals Limited |
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Electronics Corporation of (I) Ltd .,
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Visakhapatnam Steel Plant |
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Hindustan Machine Tools Limited
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Steel Authority of India Limited |
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Singareni Colleries Co. Ltd .,
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National Thermal Power Corpn.Ltd .
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Hindustan Zinc Limited |
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Cochin Shipyard Limited |
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Coal India Limited |
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C.V.R.D.E .,
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Southern Railways |
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Bharat Petroleum Corporation Ltd.,
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Central Ordinance Dept.
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Hindustan Petroleum Corporation Ltd
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Bharat Refractories Ltd .
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Ordanance Equipment Factory
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Indian Oil Corporation Ltd . |
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Indian Oil Corporation Ltd . |
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