| 37 |
maintenance of optical apparatus and instruments |
| 37 |
maintenance of optical machines and instruments |
| 37 |
maintenance of passenger elevators via remote monitoring systems |
| 37 |
maintenance of passenger lifts via remote monitoring systems |
| 37 |
maintenance of pipelines |
| 37 |
maintenance of plants |
| 37 |
maintenance of plumbing |
| 37 |
maintenance of power generating apparatus and installations |
| 37 |
maintenance of printing machines and digital printing systems |
| 37 |
maintenance of quantum computers |
| 37 |
maintenance of roads |
| 37 |
maintenance of roofing |
| 37 |
maintenance of sanitary apparatus |
| 37 |
maintenance of sanitary installations |
| 37 |
maintenance of septic systems |
| 37 |
maintenance of signboards |
| 37 |
maintenance of speedways |
| 37 |
maintenance of streets |
| 37 |
maintenance of swimming pools |
| 37 |
maintenance of telecommunications apparatus |
| 37 |
maintenance of three-dimensional [3D] printers |
| 37 |
maintenance of three-dimensional printers |
| 37 |
maintenance of tires |
| 37 |
maintenance of trailers |
| 37 |
maintenance of tyres |
| 37 |
maintenance of vehicle washing installations |
| 37 |
maintenance of vehicles |
| 37 |
maintenance of vehicles and machines |
| 37 |
maintenance of watches |
| 37 |
maintenance of water pollution control equipment |
| 37 |
maintenance of water purifying apparatus |
| 37 |
maintenance of welding machines and equipment |
| 37 |
maintenance or repair of aircraft |
| 37 |
maintenance or repair of automobiles |
| 37 |
maintenance or repair of automotive vehicles |
| 37 |
maintenance or repair of furniture |
| 37 |
maintenance or repair of motor vehicles |
| 37 |
maintenance or repair services of aircraft |
| 37 |
maintenance services |
| 37 |
maintenance services for aeroplane engines, turbines, electrical equipment, medical equipment and locomotives |
| 37 |
maintenance services for airplane engines, turbines, electrical equipment, medical equipment and locomotives |
| 37 |
maintenance services for industrial plants |
| 37 |
maintenance services for preserving an object in its original condition without changing any of its properties |
| 37 |
maintenance services of aeroplanes |
| 37 |
maintenance services of aircraft |
| 37 |
maintenance services of airplanes |
| 37 |
maintenance services of computer hardware |
| 37 |
maintenance services of computers |
| 37 |
maintenance services of electricity, gas and water distribution networks |
| 37 |
maintenance services of motor vehicles |
