| Class | Class Name |
|---|---|
| 37 | maintenance and repair of ships and yachts |
| 37 | maintenance and repair of stacker vehicles |
| 37 | maintenance and repair of utilities in buildings |
| 37 | maintenance and repair of vacuum machines and vacuum pumps |
| 37 | maintenance and repair services relating to air cargo containers, pallets, and ancillary straps and nets |
| 37 | maintenance and repair services relating to buildings, constructions and civil engineering works |
| 37 | maintenance and repair services relating to industrial plants and power plants |
| 37 | maintenance and repair services relating to machinery |
| 37 | maintenance and upgrading of hardware installed in computer networks |
| 37 | maintenance of air-conditioning apparatus for industrial purposes |
| 37 | maintenance of aircraft and aircraft parts |
| 37 | maintenance of amusement machines and apparatus |
| 37 | maintenance of automobiles |
| 37 | maintenance of bath tubs, wash basins, toilet fittings and sanitary wares |
| 37 | maintenance of bathtub |
| 37 | maintenance of battery chargers and parts thereof |
| 37 | maintenance of bicycle parking apparatus |
| 37 | maintenance of boilers |
| 37 | maintenance of car radio systems |
| 37 | maintenance of chemical plants |
| 37 | maintenance of chemical processing machines and apparatus |
| 37 | maintenance of cinematographic machines and apparatus |
| 37 | maintenance of clocks |
| 37 | maintenance of computer hardware |
| 37 | maintenance of computers |
| 37 | maintenance of constructions and apparatus for use in mooring |
| 37 | maintenance of consumer electric appliances |
| 37 | maintenance of cooking apparatus for industrial purposes |
| 37 | maintenance of cooking pots and pans |
| 37 | maintenance of digital audio players, digital visual players and audio-visual players |
| 37 | maintenance of diving machines and apparatus |
| 37 | maintenance of electric apparatus |
| 37 | maintenance of electric lighting apparatus |
| 37 | maintenance of electric motors |
| 37 | maintenance of electronic machines and instruments |
| 37 | maintenance of fire alarms |
| 37 | maintenance of fishing machines and instruments |
| 37 | maintenance of fork-lift trucks |
| 37 | maintenance of freezing machines and apparatus |
| 37 | maintenance of gas water heaters |
| 37 | maintenance of gasoline station equipment |
| 37 | maintenance of glassware manufacturing machines and apparatus |
| 37 | maintenance of hardware installed in computer systems |
| 37 | maintenance of hauling engines and apparatus |
| 37 | maintenance of heating and air-conditioning systems |
| 37 | maintenance of heating installations and air conditioning circuits |
| 37 | maintenance of hydraulic loaders |
| 37 | maintenance of industrial dish washing machines |
| 37 | maintenance of industrial furnaces |
| 37 | maintenance of industrial washing machines |
