Annual repair and maintenance of 15 nos BOPs buildings at BOPs Heerachera Rangauti Lathiapura Mangroli Tilabazar Mike Samrupara Murtichera Jeevantilla Chagaldima Samruchera Halambari Bipasamondal Khasiabasti and Halaichera of 199 Bn BSF under SHQ BSF (投標 №106744071cn)