Annual Maintenance Contract for Electronic Interlocking system ( HITACHI make ) at 26 stations ( MIX, VJA, SJL, NLPD, PGRN, PRCA, PPM, NDPU, STUR, NAKIREKALLU ( Nemalipuri ), RPCA, DKD, GJJ, RMNP, NRDP, VLG, SRMR, NLDA, MRK, TLU, CTYL, MRGA, MUK, SYM, SAB, TPPI ) in Guntur Division for a period of Two years.