bids are invited for pipelines unit , supply of portable reference cell , supply and installation of pre-packed mg 48 lbs anode long rou , supply and installation of pre-packed 18 lbs zn anode for grounding , excavation and restoration of pit , supply, installation, testing and commissioing of new earth pits , supply, installation and commissioing of spark gap arrestor , restoration of power supply at rr stations , yearly health monitoring of cppsm , preventive maintenance of air conditioning units , sitc of starting capacitor-80-100mfd , sitc of running capacitor -36 mfd , sitc of starting relay for ac, wc, rg , sitc of thermostat , sitc of over load relay ac, wc, rg , sitc of shaft for blower motor , sitc of bush for blower motor , sitc of fan blade for condenser , sitc of selector-rotary switch ac , sitc of air filter for cooling coil , sitc of blower for ac , sitc of the faulty compressor of ac , sitc of the control card , sitc of capillarycopper pipe , supply and charging of refregient gas , supply of dc-dc converter irc for maintenance of cathodic protection of total quantity : 2597