Supply, installation, testing and commissioning of different telecom material/instruments in connection with provision of electronic display boards &amp acoustic designed pa system at madhyamgram (mmg) barasat (bt) and infringement removal / left out works at krishna nagar city (knj), shantipur (stb), chandpara (cdp), berhampur court (bpc), bethuadahari (bty) bangaon (bnj), barrackpore (bp),gede (gxd), sealdah (sdah) and adjacent stations over sdah division under amrit station scheme of seald