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D142-25 Definitions of Terms Relating to Coal and Coke (Withdrawn 1941) D144-25 Specification for Asphalt for Damp-Proofing and Waterproofing (Withdrawn 1937) D145-25 Specification for Coal-Tar Pitch for Roofing, Damp-Proofing and Waterproofing (Withdrawn 1937) D147-77 Methods of Testing Bituminous Mastics (Withdrawn 1984)
Heavy Engineering Corporation Limited or "HECL" is a Public Sector Undertaking ("PSU") in Ranchi, Jharkhand, India.HECL was established in the year 1958 as one of the largest Integrated Engineering Complex in India. It manufactures and supplies capital equipments & machineries and renders project execution required for core sector industries.