Services For The Technical Gas Equipment Of Boiler Houses, Services For Checking The Performance Of Monitoring The Concentration Of Methane And Carbon Monoxide, Related To The Following Equipment: Ross Boiler, 70 Kw - 1 Pc., Elster G-6 Bk Gas Meter, Leleka Gasification Alarm - 1 Pc., Shut-Off Valve -1 Pc. (EXPIRED)