| 238220 |
Air vent installation |
| 238220 |
Air-conditioning system (except window) installation |
| 238220 |
Bathroom plumbing fixture and sanitary ware installation |
| 238220 |
Blower or fan, cooling and dry heating, installation |
| 238220 |
Boiler chipping, cleaning and scaling |
| 238220 |
Boiler, heating, installation |
| 238220 |
Central air-conditioning equipment installation |
| 238220 |
Central cooling equipment and piping installation |
| 238220 |
Central heating equipment and piping installation |
| 238220 |
Chilled water system installation |