| 3320003 | Communication & Wireless System Equipment Installation | Contracting and building works | Professional | |
| 3320006 | Measuring & Control System Installation | Contracting and building works | Professional | |
| 3530002 | District Cooling Services | Contracting and building works | Professional | |
| 3700002 | Sewage & Draining Services | Sewage and cleaning services | Professional | |
| 3700003 | Sanitary Sewer Networks Maintenance | Sewage and cleaning services | Professional | |
| 3700004 | Wastewater & Hazardous Liquids Treatment | Sewage and cleaning services | Professional | |
| 3700005 | Grease Traps Cleaning & Wastes Removal | Sewage and cleaning services | Professional | |
| 3811001 | Garbage Disposal Services | Sewage and cleaning services | Professional | |
| 3811004 | Construction & Demolition Waste Collection & Transportation Services | Sewage and cleaning services | Professional | |
| 3811006 | Sea & Shore Cleaning Services | Sewage and cleaning services | Professional | |
| 3812007 | Hazardous Waste Collection & Transport | Sewage and cleaning services | Professional | |
| 3900001 | Pollution & Environment Protection Services | Sewage and cleaning services | Professional | |
| 4100002 | Building Contracting | Contracting and building works | Commercial | |
| 4100003 | Steel Constructions Contracting | Contracting and building works | Commercial | |
| 4100004 | Pre-Fabricated Buildings Contracting | Contracting and building works | Commercial | |
| 4100006 | Pre-Fabricated Concrete Houses Contracting | Contracting and building works | Commercial | |
| 4100007 | Prestressed Concrete Contracting | Contracting and building works | Professional | |
| 4100013 | Meteorology Projects Contracting | Contracting and building works | Commercial | |
| 4100017 | 3D Printing Building Construction Contracting | Contracting and building works | Commercial | |
| 4210001 | Road Contracting | Contracting and building works | Commercial | |
