| Class | Class Name |
|---|---|
| 37 | maintenance of in-house audio-video systems |
| 37 | maintenance of integrated circuits manufacturing machines and systems |
| 37 | maintenance of jewellery |
| 37 | maintenance of laboratory apparatus |
| 37 | maintenance of laboratory apparatus and instruments |
| 37 | maintenance of lifting machines and apparatus |
| 37 | maintenance of loaders for harvesters |
| 37 | maintenance of loading and lifting cranes |
| 37 | maintenance of machine belts and couplings |
| 37 | maintenance of machines |
| 37 | maintenance of machines and machine tools |
| 37 | maintenance of motor vehicles |
| 37 | maintenance of motor vehicles for use in motor-sport events |
| 37 | maintenance of motors and engines |
| 37 | maintenance of radio and television systems |
| 37 | maintenance of radio telephones |
| 37 | maintenance of replaceable vehicle platforms |
| 37 | maintenance of road |
| 37 | maintenance of sanitary installations in aircraft |
| 37 | maintenance of telecommunications equipment and wireless communications equipment |
| 37 | maintenance of telecommunications systems and telecommunications networks |
| 37 | maintenance of vehicle chassis and traction vehicle |
| 37 | maintenance of vehicles, airplanes and power engines |
| 37 | maintenance of vehicles incorporating lifting apparatus and cranes |
| 37 | maintenance of watches |
| 37 | maintenance of water and storage tanks |
| 37 | maintenance, repair, reconditioning and refurbishing of land vehicles |
| 37 | maintenance services relating to telecommunications apparatus |
| 37 | maintenance services relating to audio and visual equipment |
| 37 | maintenance services relating to computer peripherals |
| 37 | maintenance services relating to computers |
| 37 | maintenance services relating to electric and electronic apparatus |
| 37 | maintenance services relating to machines for manufacturing printed circuit boards |
| 37 | maintenance services relating to photographic apparatus and instruments |
| 37 | management of construction projects |
| 37 | management of construction work |
| 37 | masonry |
| 37 | masonry services |
| 37 | mechanical engineering services (construction) |
| 37 | mining extraction |
| 37 | mining of diamonds |
| 37 | mining services |
| 37 | motor vehicle lubrication (greasing) |
| 37 | motor vehicle maintenance and repair |
| 37 | motor vehicle polishing |
| 37 | motor vehicle varnishing |
| 37 | motor vehicle washing and cleaning |
| 37 | motor vehicles repair |
| 37 | motorcycle cleaning |
| 37 | motorcycle lubrication |
