| 37 |
office machine maintenance |
| 37 |
office machine repair |
| 37 |
office machinery installation services |
| 37 |
office machines and equipment installation, maintenance and repair |
| 37 |
offshore construction |
| 37 |
offshore drilling services |
| 37 |
oil and gas drilling |
| 37 |
oil and gas pipeline maintenance and repair |
| 37 |
oil and gas pipeline maintenance and repair services |
| 37 |
oil burner servicing and repair |
| 37 |
oil change services for vehicles |
| 37 |
oil drilling |
| 37 |
oil drilling services |
| 37 |
oil extraction services |
| 37 |
oil pipeline construction |
| 37 |
oil pipeline installation and maintenance |
| 37 |
oil pipeline installation and maintenance services |
| 37 |
oil pipeline laying |
| 37 |
oil pipeline laying services |
| 37 |
oil pipeline maintenance and repair |
| 37 |
oil pipeline maintenance and repair services |
| 37 |
oil pumping |
| 37 |
oil pumping and extraction |
| 37 |
oil pumping services |
| 37 |
oil well casing, tubing, and drill pipe installation |
| 37 |
oil well drilling |
| 37 |
oil well drilling and pumping services |
| 37 |
on site building project management |
| 37 |
on site building project management [construction supervision] |
| 37 |
on site construction project management relating to building construction |
| 37 |
on site construction project management relating to the construction of buildings |
| 37 |
on site project management relating to building construction |
| 37 |
on site project management relating to the construction of buildings |
| 37 |
on-site building project management |
| 37 |
on-site building project management [construction supervision] |
| 37 |
on-site construction project management relating to building construction |
| 37 |
on-site construction project management relating to the construction of buildings |
| 37 |
on-site construction supervision |
| 37 |
on-site project management relating to building construction |
| 37 |
on-site project management relating to the construction of buildings |
| 37 |
onshore construction |
| 37 |
open pit mining services |
| 37 |
optical machines and instruments repair or maintenance services |
| 37 |
outer and inner cleaning of aircraft |
| 37 |
outsourced IT services relating to the installation, maintenance and repair of computer hardware |
| 37 |
overhaul of engines |
| 37 |
overhaul of machines |
| 37 |
overhaul of motors |
| 37 |
overhaul of vehicles |
| 37 |
paint spraying |
