Fabrication and supply of heavy duty emergency mast complete set as per TRD/ GNT/ E. Mast/ 01/ 2021- 22, TRD/ GNT/ E. Mast/ 02/ 2021- 22, TRD/ GNT/ E. Mast/ 03/ 2021- 22 & TRD/ GNT/ E. Mast/ 04/ 2021- 22 with providing suitable bolt & nuts and fittings.