PROVN OF AUTOMATIC VALTAGE STABILIZER FOR COMN EQPT, FIRE AND SMOKE DETECTOR IN ALL OFFICES, ADDN/ ALTN TO OFFICE AND PROVISION OF WALL PANELLING IN BLDG NO BI-25 AND AOC OFFICE AND ASSOCIATED WORKS AT ADV HQ EAC UNDER GE (FW) KOLKATA (投標 №115669147cn)