Tender For repair and maintenance of electro mechanical services at ito nungambakkam, chennai-34. sh: repair and maintenance of wet riser system etc., in ito (main, annexe & wanaparthy), agaram and sigaram buildings at 121, mg road, chennai-34.subwork/packages:annual maintenance contract of firefighting system at ito (main, annexe & wanaparthy building), agaram and sigaram building, i/c materials.