Tender For repair and maintenance of substation, dg sets lifts, addressable fas system, wet risr system and air conditioners etc., in central excise (main & annexe) building, at 121, mg road, chennai-34.subwork/packages:replacement of old wornout/obsolete canteen exhaust ducting blower motor control panel with new panel along with allied work at gst/ central excise building no.121, mg road, nungambakkam, chennai-34.