Tender for Corrigendum : Supplying, Fabrication, Insertion Of 610mm Dia (od) And 12.5mm Thick Ms Casing Pipe Line 67 Mtr. In Length By Horizontal Direction Drilling (hdd) Technique Underneath The Railway Track At Mast No. 59/29, 59/31 And Mast No. 59/30, 59/32 Near Lc Gate in Parganas - West Bengal

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