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| Indian Railways |
Bharat Heavy Electrical Limited |
Power Grid Corporation of India Limited |
G.E.T. POWER
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Larsen & Toubro Limited |
Areva T&D Limited, Noida |
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| Indian Oil Corporation Ltd, (IOCL) |
Mahanagar Telephone Nigam Limited |
DOT Government of India |
Bharat Sanchar Nigam Ltd, (BSNL) |
Siemens Ltd, Kolkata |
Jindal Vijaynagar Steel Limited, Bellary, Karnataka |
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| Metro Rail-Kolkata |
Airport Authority of India- New Delhi |
Western Coalfields Ltd- Nagpur |
D.S. Constructions Ltd. Gurgaon |
Instrumentation Limited, Delhi |
Subhash Projects & Marketing Ltd, Kolkata |
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ISRO, TN |
Department of Atomic Energy-Mumbai |
Prakash Industries Limited, Champa (M.P.) |
Delhi Transco Limited |
Oil and Natural Gas Corporation (ONGC), Baroda |
Contech India Limited, Baroda |
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| Maharashtra State Electricity Board (MSEB) |
Tamil Nadu Electricity Board (TNEB) |
Crompton Greaves Limited |
Gujarat Electricity Board (GEB) |
Birla Copper, Bharuch (Gujrat) |
Bihar State Electricity Board (BSEB) |
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| Central Electronics Limited |
Central Public Works Department |
Keltron |
Visakhapatnam Steel Plant |
Andhra Pradesh State Electricity Board (APSEB) |
Madhya Pradesh State Electricity Board (MPEB) |
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| PuVVNL, Varanasi |
PVVNL, Meerut
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JdVVNL, Jodhpur |
JVVNL, Jaipur
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AVVNL, Ajmer
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MPPTCL, Jabalpur |
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| Railtel Corporation of India Limited |
Rail Vikas Nigam Limited |
Kalindee Rail Nirman Engineers Limited |
Aster Rail
Private Limited
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SHIVAKRITI International Ltd
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KEC International Ltd
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| PREMCO |
HBL Power Systems Ltd |
ARTEK Enterprise |
Hythro Power Corporation Ltd |
Tecpro Systems |
BPCL |
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