conversion of border security fencingfrom phase-ii/iii to new design fence in west bengal between bp. no. 243/mp to 764/2-s (length 210.028 km) sh in various stretches from bp no. 355/2-s to 357/1-s (4.725 km) 361/m to 365/m (6.329 km) 385/2-s to 385/5-s(
