[Class : 37] Construction; Operation And Maintenance Of Building Equipment; Remote Monitoring Of Operation Condition Of Building Equipment; Repair Or Maintenance Of Air Conditioning Apparatus; Repair Or Maintenance Of Burners; Repair Or Maintenance Of Boilers; Repair Or Maintenance Of Pumps; Repair Or Maintenance Of Freezing Machines And Apparatus; Repair Or Maintenance Of Power Distribution Or Control Machines And Apparatus; Repair Or Maintenance Of Power Generators; Repair Or Maintenance Of Electric Motors; Repair Or Maintenance Of Chemical Processing Machines And Apparatus; Repair Or Maintenance Of Industrial Furnaces; Repair Or Maintenance Of Industrial Gasification Furnaces; Repair Or Maintenance Of Nuclear Power Plants; Repair Or Maintenance Of Chemical Plants; Repair Or Maintenance Of Power Generating Plants.[Class : 42] Designing Of Machines, Apparatus, Instruments [Including Their Parts] Or Systems Composed Of Such Machines, Apparatus And Instruments.[Class : 7] Chemical Processing Machines And Apparatus; Non Electric Prime Movers, Not For Land Vehicles; Parts Of Non Electric Prime Movers; Gas Turbines Not For Land Vehicles; Steam Turbines, Other Than For Land Vehicles; Starters For Motors And Engines; Ac Motors And Dc Motors, Not Including Those For Land Vehicles But Including Parts For Any Ac Motors And Dc Motors; Alternators; Direct Current Generators.[Class : 11] Drying Apparatus And Installations; Recuperators; Steamers; Evaporators; Distillation Apparatus; Heat Exchangers; Gas Purification Apparatus; Industrial Furnaces; Nuclear Reactors; Gasification Furnaces For Industrial Purposes; Boilers, Other Than Parts Of Non Electric Prime Movers Or Engines.